Note 7 - Income Taxes (Details) - Deferred Income Taxes (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating loss carryforwards	$ 14,743	$ 14,491
Inventory	1,771	1,769
Other liabilities	3,365	3,055
Fixed assets	409	440
Other temporary differences	681	589
	20,969	20,344
Deferred tax valuation allowance	(20,716)	(20,344)
	$ 253