Commitments and Contingencies Warranty and Extended Warranty (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Deferred Costs, Service Revenue	$ 183,000	$ 272,000
Product Warranty Liability [Line Items]
Deferred revenue extended warranties, current	508,000
Deferred revenue extended warranties, noncurrent	283,000
Deferred revenue [Member]
Product Warranty Liability [Line Items]
Deferred Revenue, period start	1,109,000
Standard and Extended Product Warranty Accrual, Decrease for Payments	(689,000)
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued	371,000
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	0
Deferred Revenue, period end	$ 791,000