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Note I - Debt (Detail)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
USD ($)
Jun. 30, 2011
USD ($)
Dec. 31, 2011
USD ($)
Jun. 30, 2011
Minimum [Member]
Jun. 30, 2011
Maximum [Member]
Jun. 30, 2011
People's Bank of China Base Rate [Member]
China Facility [Member]
Jun. 30, 2011
Amended Amount [Member]
USD ($)
Jun. 30, 2011
Original Amount [Member]
USD ($)
Jun. 30, 2011
Amount Available for Increase Upon Approval of Lender [Member]
USD ($)
Jun. 30, 2012
China Facility [Member]
USD ($)
Jun. 28, 2012
China Facility [Member]
USD ($)
Jun. 28, 2012
China Facility [Member]
CNY
Dec. 31, 2011
China Facility [Member]
USD ($)
Jun. 30, 2011
China Facility [Member]
CNY
Line of Credit Facility, Maximum Borrowing Capacity             $ 15,000 $ 25,000 $ 25,000   $ 5,538 35,000   35,000
Debt Instrument, Basis Spread on Variable Rate       250.00% 375.00% 125.00%                
Annual Capital Expenditure Limit 10,000                          
Minimum Tangible Net Worth 50,000                          
Percentage of Net Income 50.00%                          
Percentage of Capital Issuances 100.00%                          
Letters of Credit Outstanding, Amount 2,015   1,374             384     750  
Line of Credit Facility, Remaining Borrowing Capacity 12,985   13,626             3,967     3,580  
Line of Credit Facility, Commitment Fee Percentage 0.25%                          
Line of Credit Facility, Amount Outstanding                   1,187     1,181  
Line of Credit Facility, Interest Rate at Period End                   7.60%        
Interest Expense, Debt $ 74 $ 78