Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance For Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 691	$ 460	$ 680
Charged to (Recovery of) Costs and Expense	363	293	(222)
Deductions	(193)	62	(2)
Balance at End of Period	1,247	691	460
Deferred Tax Valuation Allowance [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	3,172	2,447	1,924
Charged to (Recovery of) Costs and Expense	942	725	626
Charged to Other Accounts (net)	10,046		(103)
Balance at End of Period	14,160	$ 3,172	$ 2,447
Allowance for Convertible Notes Receivable [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Charged to (Recovery of) Costs and Expense	2,000
Balance at End of Period	$ 2,000