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Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 27, 2010 | Sep. 30, 2014
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 | $ 9.60
Date from which warrants or rights exercisable |  | Oct. 14, 2010
Warrants expiration date |  | Oct. 14, 2015
Fair value of warrants outstanding | $ 2.0 |
Outstanding stock warrants |  | 0
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 warrants | 2.07% |
Dividend yield | 0.00% |

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- Definition Date the warrants or rights are exercisable, in CCYY-MM-DD format. + 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)(3)) -URI http://asc.fasb.org/extlink&oid=26873400&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 3 -Article 4 + Details
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