Note 8 - Income Taxes (Detail) - Components of Income Tax Provision (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Federal									$ 840	$ 447	$ 1,369
State									3	(593)	15
Foreign									1,302	992	534
Federal									1,610	742	(1,415)
State									385	994	(848)
Foreign									(11)	(421)	(61)
Valuation allowance	14,600				12,500				14,600	12,500
Income tax provision	722	555	548	309	57	(419)	581	206	2,134	425	1,857
Income Tax Provision [Member]
Valuation allowance	$ (1,995)				$ (1,736)				$ (1,995)	$ (1,736)	$ 2,263