Note 12 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

2016	$	1,354
2017		631
2018		258
2019		169
2020		116
Total	$	2,528

Schedule of Product Warranty Liability [Table Text Block]

	Year Ended December 31,
	2015			2014			2013
Balance at beginning of period	$	240		$	451		$	331
Warranty provision for product sales		333			282			476
Settlements made		(158	)		(42	)		(117	)
Unused warranty provision		(126	)		(451	)		(239	)
Balance at end of period	$	289		$	240		$	451