Notes Payable, December 2021 Advance on Future Receipts Financing (Details) $ / shares in Units, $ in Thousands	Dec. 22, 2021 USD ($) wk $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 $ / shares
December 2021 Advance on Future Receipts Financing [Abstract]
Initial liability		$ 57,577	$ 36,745
Debt discount		$ 5,567	$ 4,324
Warrant exercise price (in dollars per share) | $ / shares		$ 0.20	$ 0.19	$ 0.11
December 2021 Advances on Future Receipts Financing [Member]
December 2021 Advance on Future Receipts Financing [Abstract]
Balance paid	$ 650
Cash proceeds	758
Sale of future receipts	$ 1,500
Non-recourse agreement term | wk	24
Minimum amount of receipts, payment	$ 59
Term of minimum amount for receipts | wk	6
Remaining amount of receipts for payment	$ 98
Receipts of remaining term | wk	18
Initial liability	$ 1,500
Debt discount	$ 90
Warrants to purchase common stock (in shares) | shares	8,333,334
Warrant exercise price (in dollars per share) | $ / shares	$ 0.18
Warrants expiration period		4 years