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Investments at Fair Value - Additional Information (Detail) (USD $)
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3 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | |||
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Jun. 30, 2014
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Jun. 30, 2014
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Dec. 31, 2013
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Apr. 18, 2014
Stock Option [Member]
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Jun. 30, 2014
Argus Neurooptics LLC [Member]
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Mar. 17, 2014
Argus Neurooptics LLC [Member]
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Jun. 30, 2014
Argus Neurooptics LLC [Member]
Class A Preferred Stock [Member]
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| Schedule of Equity Method Investments [Line Items] | |||||||
| Equity Method Investments | $ 250,000 | ||||||
| Equity Method Investment Ownership Percentage | 35.00% | ||||||
| Shares Received Under Purchase Agreement | 13,409,962 | ||||||
| Percentage of Shares Received Under Purchase Agreement | 83.00% | ||||||
| Preferred Units, Issued | 16,091,954 | ||||||
| Percentage of Revenue Share Amount | 5.00% | ||||||
| Short-term Investments | $ 295,000 | $ 295,000 | $ 0 | $ 243,000 | |||
| Investment Options, Expiration Date | Sep. 30, 2014 | Sep. 30, 2014 |
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- Definition
Percentage of revenue share amount. No definition available.
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- Definition
Represents the percentage of shares received under purchase agreement. No definition available.
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- Definition
Number of shares received under purchase agreement. No definition available.
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- Definition
Expiration date of the option. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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- Definition
This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of preferred units issued. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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