Description of the Business and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended
	Jul. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) item customer	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) item customer	Jun. 30, 2019 USD ($) customer	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounting Policies [Line Items]
Total intangible amortization expense		$ 2		$ 9		$ 4	$ 14
Standard product warranty period						1 year
Net loss		2,831	$ 1,369	2,337	$ 1,439	$ 4,200	3,777
Net cash used in operating activities						235	3,154
Cash and cash equivalents		5,447		$ 3,705		5,447	$ 3,705	$ 3,515	$ 3,359
Outstanding debt		400				400
PPP loan		$ 1,960				1,960
Proceeds from equity raise						$ 3,300
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] | Warrants [Member]
Accounting Policies [Line Items]
Expected term		1 year 10 months 24 days				1 year 10 months 24 days
Minimum [Member] | Warrants [Member] | Measurement Input, Price Volatility [Member]
Accounting Policies [Line Items]
Measurement input | item		0.979				0.979
Maximum [Member] | Warrants [Member]
Accounting Policies [Line Items]
Expected term		2 years 7 months 6 days				2 years 7 months 6 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		$ 420				$ 420		$ 2,891
Remaining borrowing capacity		$ 3,100				$ 3,100
Subsequent Event [Member]
Accounting Policies [Line Items]
Proceeds from equity raise	$ 6,500
Revenues [Member] | Customer Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers | customer		5				3
Revenues [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Accounting Policies [Line Items]
Concentration risk percentage		17.30%				14.61%
Revenues [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Accounting Policies [Line Items]
Concentration risk percentage		14.40%				14.43%
Revenues [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Accounting Policies [Line Items]
Concentration risk percentage		10.90%				14.02%
Revenues [Member] | Customer Concentration Risk [Member] | Customer Four [Member]
Accounting Policies [Line Items]
Concentration risk percentage		10.20%
Revenues [Member] | Customer Concentration Risk [Member] | Customer Five [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						3	3
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Accounting Policies [Line Items]
Concentration risk percentage						38.90%	13.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Accounting Policies [Line Items]
Concentration risk percentage						11.90%	13.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Accounting Policies [Line Items]
Concentration risk percentage						11.20%	12.00%