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Stockholders' Equity - Additional Information (Detail) (USD $) | 3 Months Ended
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Mar. 31, 2013
Stockholders Equity Note [Line Items] |
Number of shares of common stock to be purchased by issuing warrants | 250,000
Exercise price of stock warrants | 9.60
Warrants expiration date | Oct. 14, 2015
Fair value of warrants outstanding | $ 2,000,000
Stock warrants [Member] |
Stockholders Equity Note [Line Items] |
Percentage of weighted average expected stock volatility for warrant | 111.46%
Contract term of expected life assumption | 5 years
Percentage of risk free rate for warrant | 2.07%
Dividend yield | 0.00%
Stock warrants [Member] | Remeasuring [Member] |
Stockholders Equity Note [Line Items] |
Percentage of weighted average expected stock volatility for warrant | 36.99%
Contract term of expected life assumption | 2 years 3 months 18 days
Percentage of risk free rate for warrant | 0.47%
Dividend yield | 0.00%
Decrease in fair value of warrants | $ 51,000

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- Definition The exercise price of each class of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
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