Debt (Detail)	3 Months Ended		3 Months Ended		3 Months Ended									3 Months Ended		0 Months Ended
	Mar. 31, 2014 USD ($) quarter	Dec. 31, 2013 USD ($)	Mar. 31, 2014 Domestic Line of Credit [Member] USD ($)	Dec. 31, 2013 Domestic Line of Credit [Member] USD ($)	Mar. 31, 2014 China Facility [Member] USD ($)	Mar. 31, 2013 China Facility [Member] USD ($)	Dec. 31, 2013 China Facility [Member] USD ($)	Jun. 28, 2013 China Facility [Member] USD ($)	Jun. 28, 2013 China Facility [Member] CNY	Mar. 31, 2014 Standby Letters of Credit [Member] USD ($)	Dec. 31, 2013 Standby Letters of Credit [Member] USD ($)	Jun. 30, 2013 Amount Available for Increase Upon Approval of Lender [Member] USD ($)	Jun. 30, 2013 Amended Amount [Member] USD ($)	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2014 Maximum [Member]	Jun. 28, 2013 People's Bank of China Base Rate [Member] China Facility [Member]
Line of credit, maximum borrowing capacity								$ 5,678,000	35,000,000			$ 25,000,000	$ 15,000,000
Basis spread on variable rate (as percent)														2.50%	3.75%	125.00%
Line of credit, amount outstanding	0	0			1,622,000		2,000
Maximum funded deb to EBITA ratio , debt	2.0
Maximum funded to debt to EBITDA ratio, EBITDA	1.0
Number of Quarters (in quarters)	4
Annual capital expenditure limit	10,000,000
Minimum tangible net worth	55,000,000
Percentage of net income	50.00%
Percentage of capital issuances	100.00%
Letters of credit, amount outstanding			4,135,000	3,478,000	0		0			841,000	646,000
Line of Credit Facility, Interest Rate at Period End (as a percent)					7.00%		7.00%
Line of credit, remaining borrowing capacity			10,865,000	11,522,000						3,215,000	3,443,000
Line of credit, commitment fee percentage			0.25%
Interest Paid					$ 29,000	$ 0