Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 02, 2016
Debt Instrument [Line Items]
Warrant liability	$ 1,761,000	$ 2,100,000
Debt discount	2,200,000
Long-term debt, net , carrying amount	$ 4,000,000
Unterberg Koller Capital Fund L.P. and William W. and Dieva L. Smith [Member] | Note and Warrant Purchase Agreement [Member]
Debt Instrument [Line Items]
Purchase of warrants		1,700,000
Common stock exercise price		$ 2.74
Warrants expiration period	5 years
Notes and warrants issuance date	Sep. 06, 2016
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