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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

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