Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Summary of Valuation Allowance [Table Text Block]

Column A	Column B		Column C						Column D		Column E
			Additions
			Charged/			Charged/
	Balance		(Credited) to			(Credited) to					Balance
	Beginning		Cost and			Other					End of
	of Year		Expenses			Accounts			Deductions		Year
Description
Year ended December 31, 2017:
Doubtful trade receivables and returns and allowances	$	341	$	674		$	69		$	23	$	1,061
Deferred tax valuation allowance		11,459		315			50			-		11,824
Year ended December 31, 2016:
Doubtful trade receivables and returns and allowances	$	304	$	61		$	(24	)	$	-	$	341
Deferred tax valuation allowance		9,863		1,673			(77	)		-		11,459
Year ended December 31, 2015:
Doubtful trade receivables and returns and allowances	$	346	$	(11	)	$	(31	)	$	-	$	304
Deferred tax valuation allowance		8,944		3,134			(2,215	)		-		9,863