Note 15 - Accumulated Other Comprehensive Income (Details) - Accumulated Balances of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign Currency Translation Adjustments	$ 4,628	$ 4,220
Total	4,175	3,593
Foreign Currency Translation Adjustments	1,988	408
Total	2,089	568
Unrealized Gain (Loss) on Available-for-Sale Securities	(4)	14
Total	(4)	14
Unrealized Gain (Loss) on Available-for-Sale Securities	130	140
Foreign Currency Translation Adjustments	1,988	408
Total	2,085	582	1,614
Foreign Currency Translation Adjustments	6,616	4,628	4,220
Total	6,260	4,175	3,593
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized Gain (Loss) on Available-for-Sale Securities	37	3
Unrealized Gain (Loss) on Available-for-Sale Securities	(29)	20
Unrealized Gain (Loss) on Available-for-Sale Securities	(4)	14
Total	(4)	14
Unrealized Gain (Loss) on Available-for-Sale Securities	(33)	34
Unrealized Gain (Loss) on Available-for-Sale Securities	4	37
Auction Rate Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized Gain (Loss) on Available-for-Sale Securities	(490)	(630)
Unrealized Gain (Loss) on Available-for-Sale Securities	130	140
Unrealized Gain (Loss) on Available-for-Sale Securities	130	140	270
Unrealized Gain (Loss) on Available-for-Sale Securities	$ (360)	$ (490)	$ (630)