Debt Financing (Detail)		3 Months Ended
	Jun. 26, 2015 CNY (¥)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Jul. 31, 2017 USD ($)	May. 31, 2016 USD ($)	May. 09, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 26, 2015 USD ($)
Basis spread on variable rate (as percent)		3.00%
Annual capital expenditure limit		$ 5,000,000
Domestic Line of Credit
Letters of credit, amount outstanding		$ 7,105,000					$ 7,803,000
Line of credit, commitment fee percentage		0.25%
China Facility
Line of credit, maximum borrowing capacity	¥ 35,000,000							$ 5,428,000
Line of credit, amount outstanding		$ 0
Interest rate period end (as a percent)		5.40%					6.80%
Interest paid		$ 0	$ 27,000
Standby Letters of Credit
Letters of credit, amount outstanding		171,000					$ 57,000
Line of credit, remaining borrowing capacity		5,257,000					$ 5,335,000
Amended Amount
Line of credit, maximum borrowing capacity		15,000,000
Amount Available for Increase Upon Approval of Lender
Line of credit, maximum borrowing capacity		25,000,000
Base Rate | China Facility
Basis spread on variable rate (as percent)	125.00%
Debt Instrument, Redemption, Period One | Revolving Credit Facility
Minimum EBITDA		500,000
Debt Instrument, Redemption, Period Two | Revolving Credit Facility
Minimum EBITDA		1,000,000
Minimum working capital		$ 35,000
Subsequent Event | Amended Amount
Line of credit, maximum borrowing capacity						$ 7,000,000
Scenario, Forecast | Subsequent Event | Amended Amount
Line of credit, maximum borrowing capacity				$ 5,000,000	$ 6,000,000