Note 15 - Quarterly Results of Operations (Unaudited) - Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013
Net sales	$ 3,249	$ 2,805	$ 3,528	$ 3,320	$ 2,748	$ 2,562	$ 3,440	$ 2,191
Gross profit (loss)	1,129	917	1,100	1,226	820	(199)	1,509	461
Net (loss)	$ (254)	$ (487)	$ (245)	$ (322)	$ (677)	$ (2,169)	$ (251)	$ (2,527)
Loss per share (in dollars per share)	$ (0.02)	$ (0.04)	$ (0.02)	$ (0.03)	$ (0.06)	$ (0.18)	$ (0.02)	$ (0.21)