Note 1 - Summary Of Significant Accounting Policies (Detail) - Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance as of December 31, 2011	$ 10,003
Current period other comprehensive income	857	(6)
Current period other comprehensive income	2,426	(482)
Current period other comprehensive income	3,283	(488)
Balance as of December 31, 2012	13,286	10,003
Foreign Currency Translation Adjustment [Member]
Balance as of December 31, 2011	198
Current period other comprehensive income	857
Balance as of December 31, 2012	1,055
Unrealized Gain (Loss) on Investments [Member]
Balance as of December 31, 2011	9,805
Current period other comprehensive income	2,426
Balance as of December 31, 2012	12,231
Accumulated Other Comprehensive Income (Loss) [Member]
Balance as of December 31, 2011	10,003
Current period other comprehensive income	857	(6)
Current period other comprehensive income	2,426	(482)
Current period other comprehensive income	3,283
Balance as of December 31, 2012	$ 13,286	$ 10,003