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Summary of Stock Options Activity Under Plan (Detail) (USD $)
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6 Months Ended |
|---|---|
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Jun. 30, 2012
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|
| Number of Shares | |
| Options outstanding at beginning of period | 754,139 |
| Forfeited | 35,973 |
| Exercised | |
| Options outstanding at end of period | 717,166 |
| Options exercisable at end of period | 717,166 |
| Weighted Average Exercise Price | |
| Options outstanding at beginning period | $ 0.2 |
| Options outstanding at end of period | $ 0.20 |
| Options exercisable at end of period | $ 0.20 |
| Weighted Average Remaining Contractual Life (Years) | |
| Options outstanding at beginning of period | 7 years 8 months 12 days |
| Options outstanding at end of period | 7 years 8 months 12 days |
| Options exercisable at end of period | 7 years 8 months 12 days |