Note 4 - Inventories (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Inventory Disclosure [Abstract]
Inventory Write-down	$ 0	$ 64,000	$ 14,000	$ 80,000