Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 5,124	$ 5,825
Accounts receivable, net of allowance for doubtful accounts of $136 and $18	4,038	4,136
Inventories	2,312	2,444
Other current assets	1,227	810
Total current assets	12,701	13,215
Property and equipment, net	14,815	15,444
Operating lease right-of-use assets	1,956	2,127
Intangible assets	446	527
Total assets	29,918	31,313
Current liabilities:
Accounts payable	1,368	826
Commodities payable	1,712	1,702
Accrued salary, wages and benefits	743	787
Accrued expenses	737	683
Operating lease liabilities, current portion	407	382
Due under insurance premium finance agreements	530	128
Finance lease liabilities, current portion	86	86
Long-term debt, current portion	1,251	1,183
Total current liabilities	11,799	9,156
Operating lease liabilities, less current portion	1,705	1,948
Finance lease liabilities, less current portion	109	100
Long-term debt, less current portion	708	1,356
Derivative warrant liability	846	258
Total liabilities	15,167	12,818
Commitments and contingencies
Shareholders' equity:
Preferred stock, 20,000,000 shares authorized: Series G, convertible, 3,000 shares authorized, stated value $150, 150 shares, issued and outstanding	75	75
Common stock, no par value, 150,000,000 shares authorized, 52,310,304 shares and 51,589,674 shares, issued and outstanding	326,672	326,279
Accumulated deficit	(311,996)	(307,859)
Total shareholders' equity	14,751	18,495
Total liabilities and shareholders' equity	29,918	31,313
Line of Credit With Bank [Member]
Current liabilities:
Due under line of credit	1,800	0
Factoring Agreement [Member]
Current liabilities:
Due under line of credit	$ 3,165	$ 3,379