Income Taxes Tax rate reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Computed “expected” Federal tax benefit	$ (23,413,000)	$ (34,029,000)	$ (41,035,000)
Change in valuation allowance	7,913,000	24,233,000	(63,868,000)
(Decrease) increase due to uncertain tax positions	(64,000)	7,000
Foreign income inclusion		11,089,000
State and local income benefit, net of Federal income tax benefit	4,144,000	(11,708,000)	(4,561,000)
Change in federal tax rate			104,764,000
Foreign rate differential	(564,000)	956,000	2,084,000
Change in fair value contingent consideration	1,219,000	(280,000)	(1,084,000)
Other, net	10,765,000	9,732,000	3,700,000
Income tax benefit	$ 0	$ 0	$ 0