Description of Business and Summary of Significant Accounting Policies (Costs to Obtain and Fulfill a Contract) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Capitalized contract costs, net, current	$ 664	$ 734
Capitalized contract costs, net, noncurrent	1,000	1,200
Deferred Contract Costs [Roll Forward]
Balance, beginning of period	1,897	2,238
Costs recognized from the beginning balance	(576)	(708)
Additions, net of costs recognized	327	367
Balance, end of period	$ 1,648	$ 1,897