Debt (Schedule of carrying value of Notes and Warrants) (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Liability component:
Principal		$ 1,245
Equity component:
Warrants	[1]	318	$ 318
Conversion feature	[1]	122	122
Net carrying amount	[1]	440	440
Secured convertible notes
Liability component:
Principal		1,245	1,920
Less: debt discount and issuance costs, net of amortization		(41)	(188)
Net carrying amount		1,204	1,732
Equity component:
Current portion of liability component included under short-term debt		1,245	1,920
Liability component total		$ 1,245	$ 1,920

[1] Recorded on the condensed consolidated balance sheets as additional paid-in capital.