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Stockholders' Equity - Summary of Stock Option Activity (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Outstanding balance, number of shares | 3,350,115 | 1,381,115
Granted, number of shares | 1,150,500 | 1,969,000
Canceled/Forfeited, number of shares | 358,667 |
Outstanding balance, number of shares | 4,141,948 | 3,350,115
Outstanding balance, weighted average exercise price per share | $ 2.20 | $ 2.35
Granted, weighted average exercise price per share | $ 2.11 | $ 2.10
Canceled/Forfeited, weighted average exercise price per share | $ 2.18 |
Outstanding balance, weighted average exercise price per share | $ 2.48 | $ 2.20
Minimum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Outstanding balance, exercise price per share | $ 2.00 |
Granted, exercise price per share | $ 2.05 | $ 2.00
Canceled/Forfeited, exercise price per share | $ 2.10 |
Outstanding balance, exercise price per share | $ 2.00 | $ 2.00
Maximum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Outstanding balance, exercise price per share | $ 2.79 | $ 2.35
Granted, exercise price per share | $ 2.65 | $ 2.79
Canceled/Forfeited, exercise price per share | $ 2.79 |
Outstanding balance, exercise price per share | $ 3.25 | $ 2.79

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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
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