Note 6 - Product Warranty (Tables)

9 Months Ended

Sep. 30, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2014			2013			2014			2013
Balance at beginning of period	$	126		$	65		$	118		$	50
Provisions		-			55			194			125
Warranty services provided, net		(87	)		(25	)		(273	)		(80	)
	$	39		$	95		$	39		$	95