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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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6 Months Ended | ||
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Jun. 30, 2013
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Jun. 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 | 334,000 | 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
The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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