Fair Value Measurements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Issuable common stock upon exercise of warrants | shares	357,142
Transfer of assets and liabilities between levels	$ 0
Assets fair value on nonrecurring basis	0
Liabilities fair value on nonrecurring basis	0
Long-Term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 22,800,000
Warrants [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Risk free rate	2.18%
Expected volatility	53.00%
Expected term	6 years 7 months 2 days
Tranche Three [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Issuable common stock upon exercise of warrants | shares	428,570
Maximum borrowing capacity under loan agreement	$ 5,000,000
Percentage of probability assigned	0.00%