Stockholders' (Deficit) (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Summary of option/warrant activity | |||
Forfeited | 178,147us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod | ||
Employee Stock Option [Member] | |||
Summary of option/warrant activity | |||
Outstanding, Beginning |
6,921,084us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
6,232,991us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Granted |
828,568us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Exercised |
(462,395)dtst_CommonStockIssuedInExerciseOfStockOption / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Forfeited |
(178,147)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Cancelled/Expired |
(140,477)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
||
Outstanding, Ending |
6,280,560us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
6,921,084us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
|
Exercisable, Shares |
5,266,840us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Range of option/warrant price per share, Granted |
$ 0.15dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesGrantedExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Range of option/warrant price per share, Exercised | |||
Range of option/warrant price per share, Forfeited | |||
Range of option/warrant price per share, Cancelled/Expired |
$ 0.35dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesCancelledExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Weighted Average Exercise Price Outstanding, Beginning |
0.24us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
$ 0.26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
|
Weighted Average Exercise Price, Granted |
$ 0.15us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Weighted Average Exercise Price, Exercised | |||
Weighted Average Exercise Price, Forfeited | |||
Weighted Average Exercise Price, Cancelled/Expired |
$ 0.35us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Weighted Average Exercise Price Outstanding, Ending |
0.27us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
$ 0.24us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Exercisable, Weighted Average Exercise Price |
0.24us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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Employee Stock Option [Member] | Minimum [Member] | |||
Summary of option/warrant activity | |||
Range of option/warrant price per share, outstanding, Beginning |
$ 0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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Range of option/warrant price per share, outstanding, Ending |
0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
$ 0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
$ 0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Range of option/warrant price per share, Exercisable |
0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesExercisableExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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Employee Stock Option [Member] | Maximum [Member] | |||
Summary of option/warrant activity | |||
Range of option/warrant price per share, outstanding, Beginning |
$ 0.85dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Range of option/warrant price per share, outstanding, Ending |
0.85dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
$ 0.85dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
$ 0.85dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Range of option/warrant price per share, Exercisable |
0.85dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesExercisableExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Warrant [Member] | |||
Summary of option/warrant activity | |||
Outstanding, Beginning |
133,334us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
28,642us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Granted |
133,334us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Exercised | |||
Cancelled/Expired |
28,642us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Outstanding, Ending |
133,334us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
133,334us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Exercisable, Shares |
133,334us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Range of option/warrant price per share, outstanding, Beginning |
0.01dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
$ 0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
|
Range of option/warrant price per share, Granted |
$ 0.01dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesGrantedExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Range of option/warrant price per share, Exercised | |||
Range of option/warrant price per share, Cancelled/Expired |
$ 0.02dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesCancelledExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Range of option/warrant price per share, outstanding, Ending |
0.01dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
$ 0.01dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Range of option/warrant price per share, Exercisable |
0.01dtst_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansSharesExercisableExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Weighted Average Exercise Price Outstanding, Beginning |
0.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
$ 0.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Weighted Average Exercise Price, Granted | |||
Weighted Average Exercise Price, Exercised |
$ 0.01us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Weighted Average Exercise Price, Cancelled/Expired | |||
Weighted Average Exercise Price Outstanding, Ending |
0.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
$ 0.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
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Exercisable, Weighted Average Exercise Price |
0.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember |
X | ||||||||||
- Definition
Common stock issued in exercise of stock option. No definition available.
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X | ||||||||||
- Definition
Custom Element. No definition available.
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X | ||||||||||
- Definition
The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans. No definition available.
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X | ||||||||||
- Definition
Share-based compensation, shares authorized under stock option plans, exercise price, cancel. No definition available.
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X | ||||||||||
- Definition
Share Based Compensation Shares Authorized Under Stock Option Plans Shares Exercisable Exercise Price. No definition available.
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X | ||||||||||
- Definition
Share-based compensation, shares authorized under stock option plans, exercise price range, exercised. No definition available.
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X | ||||||||||
- Definition
Share-based compensation, shares authorized under stock option plans, exercise price range, granted. No definition available.
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X | ||||||||||
- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Weighted average price of options that were either forfeited or expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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X | ||||||||||
- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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X | ||||||||||
- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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X | ||||||||||
- Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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X | ||||||||||
- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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X | ||||||||||
- Details
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X | ||||||||||
- Details
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