Note 19 - Supplemental Disclosures of Cash Flows (Detail) - Supplemental disclosure of cash flows: (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011
Interest paid	$ 4	$ 434	$ 3
Income taxes paid	759	364	2
Income tax refund received	1,649	1,494	544
Non-cash investing and financing activities:
Acquisition of SWH, Inc. through issuance of common stock		60,825
Unrealized gains (losses) on available-for-sale securities	$ (1,566)	$ 303	$ 260