Income Taxes (Schedule Of Effective Income Tax Rate For Continuing Operations) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ (6,061,000)	$ 5,000,000
Income tax expense at federal statutory rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	$ 1,130,000	$ 329,000
State taxes, net of federal income tax benefit	0.80%	0.80%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	$ (601,000)	$ 0
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount	40,000	0
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ (278,000)	$ (86,000)
Changes in estimates related to prior year tax provision	2.10%	0.00%
Non-deductible expenses	(0.80%)	0.30%
Valuation allowance for foreign operating loss carry-forwards	0.50%	(1.10%)
Research and development tax credit	1.00%	(0.40%)
Foreign rate differences	(3.90%)	1.40%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	$ (261,000)	$ 180,000
Foreign tax incentives	5.00%	(1.80%)
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount	$ 0	$ (919,000)
Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent	0.00%	(3.90%)
effective income tax rate reconciliation, valuation allowance due to foreign losses	$ (136,000)	$ (253,000)
Valuation allowance for capital loss carry-forwards	(0.10%)	0.00%
Effective Income Tax Rate Reconciliation, Deduction, Amount	$ 6,540,000	$ (4,026,000)
Effective income tax rate for income from continuing operations	(22.70%)	(16.90%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	$ 252,000	$ (133,000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent	(0.90%)	(0.60%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount	$ 232,000	$ 73,000
Effective Income Tax Rate Reconciliation Amount - FDII	$ 0	$ (194,000)
Effective Income Tax Rate Reconciliation Percent - FDII	0.00%	(0.80%)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	$ (1,430,000)	$ 436,000
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income	$ 573,000	$ 465,000
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage	(2.00%)	2.00%