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EQUITY - DSIT Option Plan by Exercise Price Range (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 01, 2012 | Sep. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Equity [Abstract] |  |  |  |  |  |
Acorn percentage holdings in DSIT |  |  | 84.00% |  |  |
fully diluted ownership | 85.10% |  | 71.40% |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |  |
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions |  | 93.60% |  |  |  |
Options, Outstanding, Number - DSIT Option Plan |  |  | 238,764 | 240,824 | 152,400 | 152,400
Options, Outstanding, Weighted Average Exercise Price - DSIT Option Plan |  |  | $ 1.69 | $ 1.67 | $ 1.18 | $ 1.18
Exerciseable, Number - DSIT Option Plan |  |  | 0 | 0 | 0 |
Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan |  |  | $ 0 | $ 0 | $ 0 |
$1.05 - $1.26 |  |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit - DSIT Option Plan |  |  | $ 1.05 |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit - DSIT Option Plan |  |  | $ 1.26 |  |  |
Options, Outstanding, Number - DSIT Option Plan |  |  | 147,770 |  |  |
Outstanding Options, Weighted Average Remaining Contractual Term - DSIT Option Plan |  |  | 6 years 7 months 6 days |  |  |
Options, Outstanding, Weighted Average Exercise Price - DSIT Option Plan |  |  | $ 1.18 |  |  |
Exerciseable, Number - DSIT Option Plan |  |  | 0 |  |  |
Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan |  |  | $ 0 |  |  |
$2.51 |  |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit - DSIT Option Plan |  |  | $ 2.51 |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit - DSIT Option Plan |  |  | $ 2.51 |  |  |
Options, Outstanding, Number - DSIT Option Plan |  |  | 90,994 |  |  |
Outstanding Options, Weighted Average Remaining Contractual Term - DSIT Option Plan |  |  | 6 years 7 months 6 days |  |  |
Options, Outstanding, Weighted Average Exercise Price - DSIT Option Plan |  |  | $ 2.51 |  |  |
Exerciseable, Number - DSIT Option Plan |  |  | 0 |  |  |
Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan |  |  | $ 0 |  |  |

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- Definition Acorn percentage holdings in DSIT + References No definition available. + Details
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- Definition Fully diluted ownership + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Exerciseable, Number - DSIT Option Plan + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number - DSIT Option Plan + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price - DSIT Option Plan + References No definition available. + Details
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- Definition Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan + References No definition available. + Details
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- Definition Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit - DSIT Option Plan + References No definition available. + Details
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- Definition Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term - DSIT Option Plan + References No definition available. + Details
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- Definition Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit - DSIT Option Plan + References No definition available. + Details
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- Details
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- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section H + Details
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