Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Summary of Valuation Allowance [Table Text Block]

	Balance at Beginning of Year		Additions		Deductions		Balance at End of Year
Deferred tax assets valuation allowance
Year ended December 31, 2019	$	27,865	$	7,396	$	2,911	$	32,350
Year ended December 31, 2018	$	7,242	$	22,770	$	2,147	$	27,865
Year ended December 31, 2017	$	31,751	$	617	$	25,126	$	7,242

	Balance at Beginning of Year		Additions		Deductions		Balance at End of Year
Allowance for doubtful accounts receivable
Year ended December 31, 2019	$	1,257		1,361		1,264		1,354
Year ended December 31, 2018	$	9	$	1,880	$	632	$	1,257
Year ended December 31, 2017	$	21	$	14	$	26	$	9