Note 6 - Debt - Summary of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Total debt	$ 573	$ 2,719
Less: debt discounts	(5)	(1,578)
Total debt, net	568	1,141
Less: current portion of debt	(568)	(1,047)
Non-current portion of debt	0	94
Unsecured Debt [Member]
Total debt	43	231
Financing Agreements [Member]
Total debt	346	22
Related Party Note [Member]
Total debt	184	510
Senior Secured Promissory Notes [Member]
Total debt	0	1,677
Paycheck Protection Program, CARES Act [Member]
Total debt	$ 0	$ 279

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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