Note 9 - Income Taxes (Detail) - Unrecognized Tax Benefits (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Balance			$ 449
Additions (reductions) to tax positions of prior years	272
Balance			449
Tax [Member]
Balance	266		402
Additions (reductions) to tax positions of prior years	(112)	266
Balance	$ 154	$ 266	$ 402