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Organization and Description of Business - Additional Information (Detail) (USD $)
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3 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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Jun. 30, 2013
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Dec. 31, 2013
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Jun. 30, 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
Nuro Pharma, Inc [Member]
Bridge Loan [Member]
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Mar. 17, 2014
Nuro Pharma, Inc [Member]
Bridge Loan [Member]
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| Organization And Nature Of Business [Line Items] | |||||||||
| Equity Method Investment Ownership Percentage | 35.00% | ||||||||
| Financing Receivable, Recorded Investment, Current | $ 50,000 | ||||||||
| Loans Receivable Interest Rate | 8.00% | ||||||||
| Long-term Investments, Total | 250,000 | 250,000 | 0 | 250,000 | 250,000 | ||||
| Payments to Acquire Short-term Investments | $ 295,000 | $ 0 | $ 243,000 | ||||||
| Investment Options, Expiration Date | Sep. 30, 2014 | Sep. 30, 2014 | |||||||