Note 7 - Bank Lines of Credit and Other Debt (Detail)	6 Months Ended
	Jun. 30, 2012 USD ($)	Apr. 23, 2016 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 EUR (€)	Apr. 25, 2012 USD ($)	Apr. 23, 2016 Line Of Credit Facility Less Than Fifty Percent Of Maximum Borrowing Capacity Member Base Rate Loans [Member]	Apr. 23, 2016 Line Of Credit Facility Less Than Fifty Percent Of Maximum Borrowing Capacity Member LIBOR Rate [Member]	Apr. 23, 2016 Line Of Credit Facility Less Than Fifty Percent Of Maximum Borrowing Capacity Member Euros Or Pound Sterling Rate [Member]	Apr. 23, 2016 Line Of Credit Facility Less Than Fifty Percent Of Maximum Borrowing Capacity Member	Apr. 23, 2016 Line Of Credit Facility Greater Than Fifty Percent Of Maximum Borrowing Capacity Member Base Rate Loans [Member]	Apr. 23, 2016 Line Of Credit Facility Greater Than Fifty Percent Of Maximum Borrowing Capacity Member LIBOR Rate [Member]	Apr. 23, 2016 Line Of Credit Facility Greater Than Fifty Percent Of Maximum Borrowing Capacity Member Euros Or Pound Sterling Rate [Member]	Apr. 23, 2016 Line Of Credit Facility Greater Than Fifty Percent Of Maximum Borrowing Capacity Member	Apr. 23, 2016 LIBOR [Member]	Apr. 23, 2016 Federal Funds Rate [Member]
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)	$ 20,530,000
Line Of Credit Facility Maturity Term	6 months
Line of Credit Facility, Maximum Borrowing Capacity (in Euro and Dollars)		35,000,000	1,519,000	1,200,000
Letters Of Credit Maximum Borrowing Capacity (in Dollars)		5,000,000
Debt Instrument, Basis Spread on Variable Rate														1.00%	0.50%
Fifty Percent Of Line Of Credit Facility Maximum Borrowing Capacity									50.00%				50.00%
Debt Instrument, Interest Rate, Stated Percentage						1.25%	2.25%	3.00%		1.50%	2.50%	3.25%
Eligible Accounts Receivable Percentage		85.00%
Eligible Extended Pay Accounts Percentage		85.00%
Line Of Credit AR Limit Value (in Dollars)		1,500,000
Lineof Credit Inventory Value Ceiling (in Dollars)		20,000,000
Line Of Credit Facility Percentage Of Eligible Inventory		65.00%
Line Of Credit Facility Net Recovery Percentage		85.00%
Line Of Credit Inventory Reserve Amount (in Dollars)		3,500,000
Credit Facility Covenant Capital Expenditures (in Dollars)		2,400,000
Twenty Percent Of Line Of Credit Facility Maximum Borrowing Capacity		20.00%
Repayments On Lines Of Credit (in Dollars)					$ 9,924,000