Credit Facility - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 02, 2013	Aug. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Debt Disclosure [Abstract]
Term agreement of senior secured credit facility	3 years
Amount of senior secured credit facility	$ 25,000,000
Percentage of eligible account receivable	80.00%
Percentage of domestically held raw material and finished goods inventory	35.00%
Percentage of advances against inventory	40.00%	45.00%
Amount of aggregate outstanding principal on the revolving line of credit	$ 10,000,000	$ 10,000,000
Option to borrow at an interest rate of LIBOR plus	2.75%
Option to borrow at an interest rate of Wall Street Journal prime rate plus	0.50%
Liquidity rate	$ 20,000,000
Borrowing interest rate options	2.25%
Percentage of unused revolving line facility fee	0.375%	0.50%
Adjusted quick ratio	1.40
Percentage of maintain operating and other deposit accounts	25.00%
Interest expense			$ 28,000	$ 29,000	$ 98,000	$ 76,000
Interest expense charged on the unused portion of the facility			$ 24,200	$ 29,000	$ 87,000	$ 76,000