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Long Term Debt - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Sep. 02, 2016
Debt Instrument [Line Items]    
Debt instrument maturity period 3 years  
Debt interest rate 10.00%  
Unterberg Koller Capital Fund L.P. and William W. and Dieva L. Smith [Member] | Note and Warrant Purchase Agreement [Member]    
Debt Instrument [Line Items]    
Warrants expiration period 5 years  
Purchase of warrants   1,700,000
Common stock exercise price   $ 2.74
Unterberg Koller Capital Fund L.P. and William W. and Dieva L. Smith [Member] | Senior Subordinated Notes [Member] | Note and Warrant Purchase Agreement [Member]    
Debt Instrument [Line Items]    
Aggregate principal amount   $ 4,000,000