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Stock-Based Compensation - Additional Information (Detail) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
Plans
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Sep. 30, 2013
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Dec. 31, 2013
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Jun. 30, 2010
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Sep. 30, 2014
2006 Equity Incentive Plan [Member]
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Sep. 30, 2014
2003 Stock Option Plan [Member]
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Sep. 30, 2014
Hong Kong Subsidiary [Member]
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Sep. 30, 2013
Hong Kong Subsidiary [Member]
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Jun. 30, 2010
Hong Kong Subsidiary [Member]
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Sep. 30, 2014
Hong Kong Subsidiary [Member]
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Sep. 30, 2013
Hong Kong Subsidiary [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||
| Number of equity incentive plans | 2 | ||||||||||||
| Shares outstanding under equity incentive plans | 700,000 | 700,000 | 893,000 | 700,000 | 12,000 | ||||||||
| Shares available for grant under equity incentive plans | 467,000 | ||||||||||||
| Expense related to options granted under equity incentive plan | $ 19,000 | $ 12,000 | $ 60,000 | $ 64,000 | |||||||||
| Stock options granted under equity incentive plans | 0 | 0 | |||||||||||
| Unrecognized compensation expense related to non-vested stock options | 80,000 | 80,000 | |||||||||||
| Recognition of unrecognized compensation expense, weighted-average period (in years) | 1 year 2 months 1 day | ||||||||||||
| Value funded to affiliates | 1,000,000 | ||||||||||||
| Agreed additional funding to affiliates | 1,000,000 | ||||||||||||
| Equity ownership percentage to benefit China employees | 38.00% | ||||||||||||
| Price of warrant | 1.00 | ||||||||||||
| Vesting period of warrant | Vesting to occur one-third upon the first anniversary of the warrant and the remaining two-thirds to vest on a monthly basis over the succeeding 24 months. | ||||||||||||
| Investment warrants expiration period (years) | 6 years | ||||||||||||
| Warrant exercise date | May 05, 2013 | ||||||||||||
| Estimated fair value of warrants | 365,000 | 365,000 | |||||||||||
| Warrant performance period (years) | 3 years | ||||||||||||
| Stock expenses on equity-based payments related to warrant | $ 0 | $ 0 | $ 0 | $ 40,000 | |||||||||