Promissory Notes - Narrative (Details) $ / shares in Units, shares in Millions											1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 27, 2023 USD ($) $ / shares	Sep. 07, 2023 USD ($) $ / shares	Jul. 25, 2023 USD ($)	Jul. 14, 2023 USD ($) $ / shares	Oct. 25, 2022 USD ($) day $ / shares	Aug. 29, 2022 USD ($) day $ / shares	Oct. 25, 2021 USD ($) $ / shares	Nov. 10, 2020 USD ($) installment	May 13, 2020 USD ($) installment	Apr. 10, 2020 USD ($)	Dec. 31, 2022 USD ($) installment	Jun. 30, 2020 USD ($)	Dec. 31, 2023 USD ($) covenant	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	May 01, 2023 USD ($)	Apr. 17, 2023 USD ($)	Mar. 30, 2023 USD ($)
Long-term Investments
Weighted average interest rate (as percent)											8.10%		10.90%	8.10%
Number of covenants breached | covenant													2
Principal amount											$ 17,978,000		$ 18,923,000	$ 17,978,000
Proceeds from issuance of convertible notes													7,650,000	4,875,000
Repayments of convertible notes													0	40,833,000
Debt, current											15,527,000		24,487,000	15,527,000
Long-term Note, less current portion											1,958,000		3,943,000	1,958,000
Unused borrowing capacity													11,500,000
Net lease liabilities													14,112,000
Fiducia Stock Purchase Agreement
Long-term Investments
Extinguishment of debt			$ 2,400,000
Unsecured Debt | Small Business Association Paycheck Protection Program
Long-term Investments
Interest rate (as percent)										1.00%
Proceeds from issuance of convertible notes										$ 300,000
Number of installments | installment								18
Installment payable								$ 18,993
Convertible Debenture
Long-term Investments
Principal and accrued and unpaid interest															$ 17,600,000
Shares issued upon conversion of debt (in shares) | shares															9.4
Interest expense															$ 600,000
Convertible Debenture Due October 2022 - YA II PN
Long-term Investments
Principal and accrued and unpaid interest														$ 16,800,000
Shares issued upon conversion of debt (in shares) | shares														67.1
Repayments of principal and accrued unpaid interest														$ 42,200,000
Interest expense														1,200,000
Convertible Debenture YA II PN First Amendment
Long-term Investments
Principal amount																		$ 1,400,000
Option to purchase percentage of issued and outstanding common stock																		0.70
Option aggregate purchase price																		$ 2,500,000
Convertible Debenture YA II PN Second Amendment
Long-term Investments
Principal amount																	$ 800,000
Option to purchase percentage of issued and outstanding common stock																	1
Option aggregate purchase price																	$ 3,500,000
Convertible Debenture YA II PN Third Amendment
Long-term Investments
Principal amount																$ 4,100,000
Option aggregate purchase price																$ 3,500,000
Convertible Debenture YA II PN Fourth Amendment
Long-term Investments
Principal amount	$ 1,500,000	$ 500,000		$ 1,850,000
Interest rate (as percent)	0.00%
Option aggregate purchase price	$ 1,300,000	$ 450,000		$ 1,550,000
Volume weighted average price, maximum threshold (in dollars per share) | $ / shares				$ 1.25
Volume weighted average price threshold period				5 days
Volume weighted average price period				7 days
Redemption payment period				10 days
Redemption percentage				20.00%
Debt default, volume weighted average price (in dollars per share) | $ / shares	$ 2.30	$ 2.46		$ 8.75
Debt default, volume weighted average price percentage	90.00%	90.00%		90.00%
Debt default, volume weighted average price period	10 days	10 days		10 days
Debt default, volume weighted average price, minimum (in dollars per share) | $ / shares	$ 0.46	$ 0.492		$ 1.25
Notes purchased at discount (as percent)	90.00%
Debt default interest rate	18.00%	18.00%
Convertible Debenture YA II PN Fourth Amendment | Debt Instrument, Payment Tranche One
Long-term Investments
Repayments of convertible notes	$ 900,000
Convertible Debenture YA II PN Fourth Amendment | Debt Instrument, Payment, Tranche Two
Long-term Investments
Repayments of convertible notes	$ 400,000
Convertible Debenture YA II PN Fourth Amendment | Debt Covenant, Period One
Long-term Investments
Principal amount				$ 1,400,000
Convertible Debenture YA II PN Fourth Amendment | Debt Covenant, Period Two
Long-term Investments
Principal amount				800,000
Convertible Debenture YA II PN Fourth Amendment | Debt Covenant, Period Three
Long-term Investments
Principal amount				$ 1,700,000
Convertible Debenture due February 24, 2023 – YA II PN
Long-term Investments
Repayments of principal and accrued unpaid interest													4,200,000	2,200,000
Interest expense													2,000,000	1,200,000
Debt discount amortization													1,600,000	1,100,000
Extinguishment of debt													300,000
Commercial Insurance Premium Finance
Long-term Investments
Principal amount											$ 992,000		352,000	$ 992,000
Note amount prior to change in insurance coverage													500,000
Commercial Insurance Premium Finance Two
Long-term Investments
Interest rate (as percent)											6.16%			6.16%
Number of installments | installment											9
Installment payable											$ 100,000			$ 100,000
Other Lending Agreements
Long-term Investments
Principal amount											$ 10,325,000		$ 8,445,000	$ 10,325,000
Weighted average interest rate (as percent)													9.90%
Debt, current													$ 12,900,000
Other Lending Agreements | Minimum
Long-term Investments
Interest rate (as percent)													0.10%
Other Lending Agreements | Maximum
Long-term Investments
Interest rate (as percent)													20.00%
Vendor Notes Payable | Delaware Board Of Trade Holdings Inc
Long-term Investments
Interest rate (as percent)									0.25%			4.00%
Interest expense												$ 100,000
Number of installments | installment									2
Installment payable									$ 30,000
Initial amount paid									30,000
Unsecured promissory note									$ 60,000
Net lease liabilities												$ 900,000
YA II PN, Ltd | Convertible Debenture
Long-term Investments
Conversion price (in dollars per share) | $ / shares						$ 1.50
Principal amount						$ 16,700,000
Percentage of stock price trigger						85.00%
Consecutive trading days | day						7
Conversion price of common stock (in dollars per share) | $ / shares						$ 0.20
YA II PN, Ltd | Convertible Debenture | Convertible Debenture
Long-term Investments
Principal amount					$ 6,500,000
Interest rate (as percent)					8.00%
Interest rate in the event of default					18.00%
Conversion price (in dollars per share) | $ / shares					$ 0.05
Percentage of stock price trigger					95.00%
Consecutive trading days | day					5
Proceeds from issuance of convertible notes					$ 4,900,000
YA II PN, Ltd | Convertible Debenture | Convertible Debenture
Long-term Investments
Principal amount							$ 75,000,000
Total purchase price in asset acquisition							$ 75,000,000
Interest rate (as percent)							4.00%
Interest rate in the event of default							18.00%
Conversion price (in dollars per share) | $ / shares							$ 1.88
Redemption of unpaid principal per month							$ 8,300,000