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Income Taxes - Additional Information (Detail) (USD $)
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12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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| Income Taxes [Line Items] | ||
| Net operating loss carry forwards expiration period | Expire between 2012 and 2031 | Expire between 2011 and 2031 |
| Valuation allowance | $ 16,187,000 | $ 13,108,000 |
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Federal
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| Income Taxes [Line Items] | ||
| Net operating loss carry forwards | 48,751,000 | 33,902,000 |
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State and Local Jurisdiction
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| Income Taxes [Line Items] | ||
| Net operating loss carry forwards | $ 32,402,000 | $ 17,663,000 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The expiration date of each operating loss carryforward included in total operating loss carryforwards, or the applicable range of such expiration dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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