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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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3 Months Ended | |||
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Mar. 31, 2014
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Dec. 31, 2013
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Mar. 31, 2014
Argus Neurooptics LLC [Member]
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Mar. 17, 2014
Argus Neurooptics LLC [Member]
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| Accounting Policies [Line Items] | ||||
| Ownership percentage by parent | 100.00% | 35.00% | ||
| Percentage of tax benefit likely of being realized | 50.00% | |||
| Gain (Loss) on Sale of Assets and Asset Impairment Charges | $ 400,000 | |||
| Long-term Investments, Total | $ 250,000 | $ 0 | $ 250,000 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Percentage of tax benefit likely of being realized. No definition available.
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. No definition available.
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| X | ||||||||||
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- Definition
The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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