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Debt - Super G Loan Agreement and Warrant (Details) - USD ($)			12 Months Ended
	Jan. 26, 2018	Jul. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Gain on extinguishment of debt			$ 0	$ 165,000
Long-term Debt			5,507,000	0
Debt instrument, unamortized discount			102,000	0
Amortization of debt discount			$ 90,000	269,000
Super G Loan
Debt Instrument [Line Items]
Proceeds from issuance of debt		$ 1,100,000
Warrant outstanding (in shares)		550,000
Exercise price (in dollars per share)		$ 3.00
Repayments of debt	$ 1,269,000
Long-term debt	1,032,000
Gain on extinguishment of debt	165,000
Long-term Debt	1,434,000			0
Western Alliance Bank And Super G Capital
Debt Instrument [Line Items]
Debt instrument, unamortized discount	339,000			0
Debt issuance costs	174,000
Warrants outstanding	$ 165,000
Amortization of debt discount				$ 70,000