Debt Financing (Detail)	1 Months Ended	12 Months Ended			12 Months Ended
	Jun. 30, 2011	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2011 Amount Available for Increase Upon Approval of Lender USD ($)	Dec. 31, 2013 Leverage Ratio	Dec. 31, 2013 China Facility USD ($)	Jun. 28, 2013 China Facility USD ($)	Jun. 28, 2013 China Facility CNY	Dec. 31, 2012 China Facility USD ($)	Jun. 30, 2011 Minimum	Jun. 30, 2011 Maximum	Jun. 28, 2012 People's Bank of China Base Rate China Facility	Jun. 30, 2011 Original Amount USD ($)	Jun. 28, 2012 Original Amount China Facility CNY
Line of Credit Facility, Expiration Date	Jun. 30, 2015
Line of Credit Facility, Maximum Borrowing Capacity				$ 25,000,000			$ 5,725,000	35,000,000					$ 15,000,000	35,000,000
Debt Instrument, Basis Spread on Variable Rate										250.00%	375.00%	125.00%
Line of Credit Facility, Covenant Terms					2.0:1.0
Annual Capital Expenditure Limit		10,000,000
Minimum Tangible Net Worth		55,000,000
Percentage of Net Income (as a percent)		50.00%
Percentage of Capital Issuances		100.00%
Letters of Credit Outstanding, Amount		3,478,000	7,432,000			646,000			1,112,000
Line of Credit Facility, Remaining Borrowing Capacity		11,522,000	7,568,000			3,443,000			4,429,000
Line of Credit Facility, Commitment Fee Percentage		0.25%
Line of Credit Facility, Amount Outstanding						$ 1,636,000			$ 0
Line of Credit Facility, Interest Rate at Period End (as a percent)						7.00%			7.00%