Note 9 - Accumulated Other Comprehensive Income (Details) - Accumulated Balances of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of January 1, 2014	$ 6,020	$ 6,616		$ 6,616
Balance as of January 1, 2014	5,652	6,260		6,260
Foreign Currency Translation Adjustments	6,196	6,020		6,196
Total	5,840	5,652		5,840
Foreign Currency Translation Adjustments	176	(596)
Total	189	(608)
Unrealized Gain (Loss) on Available-for-Sale Securities	(1)
Total	(1)
Unrealized Gain (Loss) on Available-for-Sale Securities		(17)		5
Foreign Currency Translation Adjustments	176	(596)
Total	188	(608)	830	(420)	1,110
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of January 1, 2014	9	4		4
Unrealized Gain (Loss) on Securities	16	9		16
Unrealized Gain (Loss) on Available-for-Sale Securities	8	5
Unrealized Gain (Loss) on Available-for-Sale Securities	(1)
Total	(1)
Unrealized Gain (Loss) on Available-for-Sale Securities	7	5
Auction Rate Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of January 1, 2014	(377)	(360)		(360)
Unrealized Gain (Loss) on Securities	(372)	(377)		(372)
Unrealized Gain (Loss) on Available-for-Sale Securities	5	(17)
Unrealized Gain (Loss) on Available-for-Sale Securities	$ 5	$ (17)	$ (17)	$ (12)	$ (32)