Revenue Recognition Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 256
Contract with Customer, Asset, Net, Current	64	$ 65
Contract with Customer, Asset, Net, Noncurrent	1,853	999
Contract with Customer, Asset, after Allowance for Credit Loss	1,917	1,064
Contract with Customer, Liability, Discounts	(2,070)	(1,656)
Contract with Customer, Refund Liability	807	325
Contract with Customer, Liability, Current	$ (2,877)	$ (1,981)