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Note 12 - Related Party Transactions - Related Party Balances and Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Promissory notes payable	$ 1,595
Long-term Debt, Total	2,023	$ 2,234
Interest expense	430	367
Notes Payable, Other Payables [Member]
Promissory notes payable	1,595	1,995
Discount on notes payable	22	131
Accrued interest outstanding	450	370
Notes Payable, Other Payables [Member] \| MHW SPV II, LLC [Member]
Promissory notes payable	945	945
Discount on notes payable	11	32
Long-term Debt, Total	934	913
Accrued interest outstanding	268	221
Interest expense	143	136
Notes Payable, Other Payables [Member] \| MHW Partners [Member]
Promissory notes payable	650	650
Discount on notes payable	11	33
Long-term Debt, Total	639	617
Accrued interest outstanding	182	149
Interest expense	$ 98	$ 93

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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