Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Summary of Valuation Allowance [Table Text Block]

Col. A	Col. B		Col. C					Col. D			Col. E
			Additions
			(1)			(2)
	Balance at		Charged to			Charged to					Balance at
	Beginning		Costs and			Other		Deductions			End of
Description	of Period		Expenses			Accounts (a)		(b)			Period
Year Ended December 31, 2017:
Allowance for doubtful accounts	$	3,163	$	2,400		$	-	$	(957	)	$	4,606
Valuation allowance for deferred tax assets	$	1,532	$	(1,457	)	$	-	$	-		$	75
Year Ended December 31, 2016:
Allowance for doubtful accounts	$	1,794	$	1,917		$	167	$	(715	)	$	3,163
Valuation allowance for deferred tax assets	$	1,683	$	-		$	-	$	(151	)	$	1,532
Year Ended December 31, 2015:
Allowance for doubtful accounts	$	1,667	$	606		$	-	$	(479	)	$	1,794
Valuation allowance for deferred tax assets	$	2,052	$	-		$	-	$	(369	)	$	1,683