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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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| Accounting Policies [Abstract] | |||
| Maturity of highly liquid debt instruments | 3 months | ||
| Uncollectible | $ 0 | $ 0 | |
| Allowance for doubtful accounts | 0 | 0 | |
| Inventories, net of reserve | 416,000 | 538,000 | |
| Forfeiture allocation | $ 0 | $ 0 | |
| X | ||||||||||
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- Definition
Accounts Receivable Deemed Uncollectible Amount No definition available.
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- Definition
Maximum Maturity Period Of Highly Liquid Debt Instruments Consider As Cash Equivalents No definition available.
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- Details
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
A valuation allowance for receivables due to an Entity for more than one year from the balance sheet date that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of valuation reserve for inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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