Description of the Business and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020 USD ($) item customer	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($) customer	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2020 USD ($) item customer	Sep. 30, 2019 USD ($) customer	Dec. 31, 2019 USD ($)
Accounting Policies [Line Items]
Total intangible amortization expense	$ 2			$ 9			$ 6	$ 24
Standard product warranty period							1 year
Net loss	3,531	$ 2,831	$ 1,369	315	$ 2,337	$ 1,439	$ 7,731	4,092
Net cash used in operating activities							1,694	5,253
Cash and cash equivalents	10,283			$ 2,563			10,283	$ 2,563	$ 3,515
Outstanding debt	500						500
PPP loan	$ 1,960						1,960
Proceeds from equity raise							$ 9,800
Work status reduction program, percentage decrease in senior management compensation							20.00%
Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Accounting Policies [Line Items]
Measurement input | item	0						0
Minimum [Member]
Accounting Policies [Line Items]
Expected term	1 year 8 months 12 days						1 year 8 months 12 days
Minimum [Member] | Warrants [Member] | Measurement Input, Price Volatility [Member]
Accounting Policies [Line Items]
Measurement input | item	1.059						1.059
Maximum [Member]
Accounting Policies [Line Items]
Expected term	2 years 3 months 18 days						2 years 3 months 18 days
Maximum [Member] | Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Accounting Policies [Line Items]
Measurement input | item	0.0030						0.0030
Revolving Credit Facility [Member]
Accounting Policies [Line Items]
Outstanding debt	$ 490						$ 490		$ 2,891
Remaining borrowing capacity	$ 2,300						$ 2,300
Revenues [Member] | Customer Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers | customer	2			1			3
Revenues [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Accounting Policies [Line Items]
Concentration risk percentage	22.00%			12.00%			17.00%
Revenues [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Accounting Policies [Line Items]
Concentration risk percentage	16.00%						12.00%
Revenues [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Accounting Policies [Line Items]
Concentration risk percentage							12.00%
Revenues [Member] | Customer Concentration Risk [Member] | No Customers [Member] | Maximum [Member]
Accounting Policies [Line Items]
Concentration risk percentage								10.00%
Cost of Goods, Product Line [Member] | Supplier Concentration Risk [Member]
Accounting Policies [Line Items]
Number of suppliers | item							2
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers | customer							2	2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Accounting Policies [Line Items]
Concentration risk percentage							31.00%	12.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Accounting Policies [Line Items]
Concentration risk percentage							17.00%	10.00%