Income Taxes - Valuation Allowance Rollforward (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances, Beginning Balance	$ 7,520,000	$ 7,401,000	$ 6,344,000
Purchase Accounting Adjustment	13,752,000	0	0
Additional Valuation Allowance	832,000	650,000	1,127,000
Allowance Utilization and Other	(8,227,000)	(471,000)	(61,000)
Exchange Rate Changes and Other Adjustments	(43,000)	(60,000)	(9,000)
Valuation Allowance, Ending Balance	$ 13,834,000	$ 7,520,000	$ 7,401,000