Note 9 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

2014	$	739
2015		600
2016		567
2017 and thereafter		113
Total	$	2,019

Schedule of Product Warranty Liability [Table Text Block]

	Year Ended December 31,
	2013			2012			2011
Balance at beginning of period	$	331		$	561		$	764
Warranty provision for product sales		476			917			870
Settlements made		(117	)		(675	)		(626	)
Unused warranty provision		(239	)		(472	)		(447	)
Balance at end of period	$	451		$	331		$	561