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Board of Directors granted stock options (Details) (USD $)
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Jun. 03, 2012
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Jan. 12, 2012
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Dec. 14, 2011
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Aug. 12, 2011
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May 13, 2011
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Apr. 06, 2011
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| Granted Stock option details |
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| Board of Directors granted stock options to purchase shares of common stock |
3,400fil_Boardofdirectorsgrantedstockoptionstopurchasesharesofcommonstock2 |
480fil_Boardofdirectorsgrantedstockoptionstopurchasesharesofcommonstock2 |
10,000fil_Boardofdirectorsgrantedstockoptionstopurchasesharesofcommonstock2 |
480fil_Boardofdirectorsgrantedstockoptionstopurchasesharesofcommonstock2 |
3,000fil_Boardofdirectorsgrantedstockoptionstopurchasesharesofcommonstock2 |
169,450fil_Boardofdirectorsgrantedstockoptionstopurchasesharesofcommonstock2 |
| Granted Stock option exercise price per share |
$ 13.6fil_GrantedStockOptionExercisePricePerShare |
$ 1.25fil_GrantedStockOptionExercisePricePerShare |
$ 3.75fil_GrantedStockOptionExercisePricePerShare |
$ 12.5fil_GrantedStockOptionExercisePricePerShare |
$ 15fil_GrantedStockOptionExercisePricePerShare |
$ 16.25fil_GrantedStockOptionExercisePricePerShare |
| The weighted average fair value of the options granted was estimated per share |
$ 3.88fil_TheWeightedAverageFairValueOfTheOptionsGrantedWasEstimatedPerShare |
$ 1fil_TheWeightedAverageFairValueOfTheOptionsGrantedWasEstimatedPerShare |
$ 2fil_TheWeightedAverageFairValueOfTheOptionsGrantedWasEstimatedPerShare |
$ 10.75fil_TheWeightedAverageFairValueOfTheOptionsGrantedWasEstimatedPerShare |
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$ 14.6fil_TheWeightedAverageFairValueOfTheOptionsGrantedWasEstimatedPerShare |
| These options vest over three years and have a term of |
10fil_TheseOptionsVestOverThreeYearsAndHaveATermOf |
10fil_TheseOptionsVestOverThreeYearsAndHaveATermOf |
10fil_TheseOptionsVestOverThreeYearsAndHaveATermOf |
10fil_TheseOptionsVestOverThreeYearsAndHaveATermOf |
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10fil_TheseOptionsVestOverThreeYearsAndHaveATermOf |