Income Taxes (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense [Line Items]
Effective income tax rate reconciliation, at federal statutory income tax rate									25.00%	25.00%	25.00%
Undistributed earnings of foreign subsidiaries	$ 4,300,000								$ 4,300,000
Income tax expense (benefit)	(7,177,000)	$ (3,335,000)	$ (4,808,000)	$ 27,610,000	$ (5,750,000)	$ (9,404,000)	$ (5,020,000)	$ (5,273,000)	12,290,000	$ (25,447,000)	$ (18,249,000)
Income Tax Expense Benefit Related To Unremitted Earnings Of Foreign Subsidiaries									26,700
Deferred tax liability not recognized, amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries	100,000								100,000
Operating loss carryforwards	31,900,000								31,900,000
Operating loss carryforwards, expiring in next three years	12,400,000								12,400,000
Operating loss carryforwards, expiring in years four, five and six	3,200,000								3,200,000
Operating loss carryforwards, expiring in years seven, eight and nine	2,800,000								2,800,000
Operating loss carryforwards, expiring thereafter	200,000								200,000
Deferred tax assets, operating loss carryforwards, not subject to expiration	13,300,000								13,300,000
Expired net operating loss carryforwards	500,000								500,000
Unrecognized tax benefits, income tax penalties and interest expense									1,300,000	600,000	600,000
Unrecognized tax benefits, income tax penalties and interest accrued	5,100,000				3,900,000				5,100,000	3,900,000	3,300,000
Unrecognized tax benefits that would impact effective tax rate	$ 900,000				$ 600,000				900,000	$ 600,000	$ 1,800,000
Corporate Restructuring [Member]
Income Tax Expense [Line Items]
Income tax expense (benefit)									$ 60,700