Note K - Debt (Detail)	3 Months Ended							3 Months Ended
	Mar. 31, 2013 USD ($)	Jun. 30, 2011 Minimum [Member]	Jun. 30, 2011 Maximum [Member]	Jun. 29, 2012 People's Bank of China Base Rate [Member] China Facility [Member]	Jun. 30, 2011 Amended Amount [Member] USD ($)	Jun. 30, 2011 Original Amount [Member] USD ($)	Jun. 30, 2011 Amount Available for Increase Upon Approval of Lender [Member] USD ($)	Mar. 31, 2013 Domestic Line of Credit [Member] USD ($)	Dec. 31, 2012 Domestic Line of Credit [Member] USD ($)	Mar. 31, 2013 China Facility [Member] USD ($)	Dec. 31, 2012 China Facility [Member] USD ($)	Jun. 29, 2012 China Facility [Member] USD ($)	Jun. 29, 2012 China Facility [Member] CNY	Mar. 31, 2013 Standby Letters of Credit [Member] USD ($)	Dec. 31, 2012 Standby Letters of Credit [Member] USD ($)
Line of Credit Facility, Maximum Borrowing Capacity					$ 15,000,000	$ 25,000,000	$ 25,000,000					$ 5,572,000	35,000,000
Debt Instrument, Basis Spread on Variable Rate		250.00%	375.00%	125.00%
Annual Capital Expenditure Limit	10,000,000
Minimum Tangible Net Worth	50,000,000
Percentage of Net Income	50.00%
Percentage of Capital Issuances	100.00%
Letters of Credit Outstanding, Amount								7,422,000	7,432,000	0	0			1,205,000	1,112,000
Line of Credit Facility, Remaining Borrowing Capacity								$ 7,578,000	$ 7,568,000					$ 4,366,000	$ 4,429,000
Line of Credit Facility, Commitment Fee Percentage								0.25%