Note 1 - Organization and Summary of Significant Accounting Policies (Details) - Changes in Warranty Accrual (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2012	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2011
Changes in Warranty Accrual [Abstract]
Beginning balance		$ 40	$ 40	$ 40
Warranty liabilities assumed in acquisition		79
Settlements	(1,750)	(9)
		$ 110	$ 40	$ 40