Note 6 - Product Warranty (Tables)

6 Months Ended

Jun. 30, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

	Three Months						Six Months
	Ended June 30,						Ended June 30,
	2014			2013			2014			2013
Balance at beginning of period	$	168		$	55		$	118		$	50
Provisions		81			41			194			70
Warranty services provided, net		(123	)		(31	)		(186	)		(55	)
	$	126		$	65		$	126		$	65