Debt - Narrative (Details) - USD ($)						1 Months Ended	2 Months Ended	3 Months Ended		6 Months Ended		30 Months Ended
	Apr. 17, 2020	Jan. 16, 2020	Nov. 29, 2019	Nov. 25, 2019	Mar. 29, 2019	Jan. 31, 2020	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2021	Dec. 31, 2019
Line of Credit Facility [Line Items]
Credit line borrowings, net of loan origination fees							$ 1,331,000	$ 1,331,000		$ 1,331,000			$ 715,000
Accumulated interest on subordinated debt		$ 100,000
Preferred stock, par value (in usd per share)							$ 0.0001	$ 0.0001		$ 0.0001			$ 0.0001
Percentage of gross proceeds used to make payments on note						10.00%
Gross proceeds						$ 275,000
Payments on the Iliad Note										$ 526,000	$ 0
PPP loan							$ 263,000	$ 263,000		263,000			$ 0
PPP loan, net of current maturities							532,000	532,000		532,000			0
Note Purchase Agreement
Line of Credit Facility [Line Items]
Borrowing rate				8.00%
Principal amount				$ 1,300,000
Unamortized issuance costs at date of issuance							200,000	200,000		200,000			200,000
Issue discount				142,000
Purchase price				1,100,000
Unamortized debt issuance costs				15,000
Prepayment premium			15.00%
Repurchase amount (up to)				$ 150,000
Percentage increase due to deferral of redemption option			1.50%
Total liability, net of discount and financing fees							600,000	$ 600,000		$ 600,000			1,000,000.0
Increase in amount outstanding from becoming delisted			15.00%
Percentage of gross proceeds used to make payments on note			10.00%
Increase from exercises of restricted issuance			3.00%
Payments on the Iliad Note						$ 226,000
Increase in amount outstanding from insolvency and bankruptcy event			5.00%
Interest rate after insolvency and bankruptcy events			22.00%
Note Purchase Agreement | Minimum
Line of Credit Facility [Line Items]
Increase in amount outstanding from default event			5.00%
Note Purchase Agreement | Maximum
Line of Credit Facility [Line Items]
Increase in amount outstanding from default event			15.00%
Note Purchase Agreement | Debt Instrument, Period Two
Line of Credit Facility [Line Items]
Prepayment premium			10.00%
Paycheck Protection Program
Line of Credit Facility [Line Items]
Borrowing rate	1.00%
Proceeds from loan origination	$ 795,000
Accrued interest							$ 2,000
Subsequent Event
Line of Credit Facility [Line Items]
Interest rate on convertible notes												10.00%
Convertible Debt
Line of Credit Facility [Line Items]
Proceeds from issuance of subordinated convertible promissory notes					$ 1,700,000
Principal amount									$ 1,700,000		$ 1,700,000
Interest rate on convertible notes									5.00%
Unamortized issuance costs at date of issuance		40,000.00
Net proceeds from the conversion of convertible debt to preferred stock		$ 1,800,000
Conversion rate (in dollars per share)		$ 0.67							$ 0.67		$ 0.67
Conversion of notes to preferred stock (in shares)										2,709,018
Preferred stock, par value (in usd per share)							$ 0.0001	$ 0.0001		$ 0.0001
Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit line borrowings, net of loan origination fees							$ 1,300,000	$ 1,300,000		$ 1,300,000			700,000
Unamortized issuance costs							$ 100,000	$ 100,000		$ 100,000			$ 100,000
Debt instrument, variable rate								2.00%
Borrowing rate							5.25%	5.25%		5.25%			6.75%
Overdraft fee								2.00%
Annual facility fee							1.00%	1.00%		1.00%
Maximum borrowing capacity on line of credit							$ 5,000,000.0	$ 5,000,000.0		$ 5,000,000.0
Debt instrument, term								3 years
Collateral management fee								0.50%