XML 126 R92.htm IDEA: XBRL DOCUMENT
v2.4.0.6

EQUITY Option Exercised (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Equity [Abstract] |  |  |
Shares granted in net exercise of options (in shares) | 101,619 | 148,165 | 0
Options forfeited in net exercise of options (in shares) | 148,381 | 304,167 | 0
Total net exercise options (in shares) | 250,000 | 452,332 | 0
Weighted average exercise price for net exercise options ( in dollar per share) | $ 5.06 | $ 2.69 | $ 0
Options exercised for cash ( in shares) | 150,834 | 83,666 | 0
Weighted average exercise price for options exercised for cash (in dollar per share) | $ 2.02 | $ 2.51 | $ 0

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Net Exercise in Period + References No definition available. + Details
Name: | acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNetExerciseInPeriod
Namespace Prefix: | acfn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Forfeited in Net Exercise in Period + References No definition available. + Details
Name: | acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSharesForfeitedInNetExerciseInPeriod
Namespace Prefix: | acfn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Issued for Net Exercises in Period + References No definition available. + Details
Name: | acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSharesIssuedForNetExercisesInPeriod
Namespace Prefix: | acfn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises for Cash in Period + References No definition available. + Details
Name: | acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesForCashInPeriod
Namespace Prefix: | acfn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises for Cash in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesForCashInPeriodWeightedAverageExercisePrice
Namespace Prefix: | acfn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Net Exercises in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsNetExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix: | acfn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration