Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business - Additional Information (Detail)

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Organization and Description of Business - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Argus Neurooptics LLC [Member]
Mar. 17, 2014
Argus Neurooptics LLC [Member]
Mar. 31, 2014
Nuro Pharma, Inc [Member]
Bridge Loan [Member]
Mar. 17, 2014
Nuro Pharma, Inc [Member]
Bridge Loan [Member]
Organization And Nature Of Business [Line Items]            
Equity Method Investment Ownership Percentage 100.00%     35.00%    
Financing Receivable, Recorded Investment, Current           $ 50,000
Threshold Period Past Due for Write-off of Financing Receivable         90 days  
Loans Receivable Interest Rate         8.00%  
Long-term Investments, Total $ 250,000 $ 0 $ 250,000