Note 4 - Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2016

				September 30, 2016							December 31, 2015
	Useful			Gross					Net		Gross					Net
	Lives			Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	(Years)			Amount		Amortization			Amount		Amount		Amortization			Amount
Intangibles (amount in thousands)
Patent	8	-	18	$	571	$	(266	)	$	305	$	539	$	(203	)	$	336
Software			3		395		(374	)		21		395		(364	)		31
Customer relationships			12		3,370		(1,898	)		1,472		3,370		(1,671	)		1,699
Permit			10		545		(413	)		132		545		(373	)		172
Total				$	4,881	$	(2,951	)	$	1,930	$	4,849	$	(2,611	)	$	2,238