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Consolidated Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Accounts receivable $ 1,043 $ 1,805
Inventories 22,930 25,442
Prepaid expenses 1,870 1,842
Tax credit sale receivable 0 12,300
Other current assets 2,151 2,409
Property, plant and equipment, net 199,435 199,392
Operating lease right-of-use assets 2,124 2,237
Other assets 12,466 12,977
Accounts payable 32,115 33,139
Current portion of long term debt 93,669 63,745
Short term borrowings 25,878 26,789
Other current liabilities 22,939 20,295
Other long term debt 54,693 56,201
Series A preferred units 126,759 126,593
Other long term liabilities $ 5,109 $ 5,142
Common Stock, Par Value (in dollars per share) $ 0.001 $ 0.001
Common Stock, Shares Authorized (in shares) 80,000 80,000
Common Stock, Shares Issued (in shares) 54,042 51,139
Common Stock, Shares Outstanding (in shares) 54,042 51,139
Variable Interest Entity, Primary Beneficiary [Member]    
Accounts receivable $ 98 $ 57
Inventories 224 157
Prepaid expenses 32 85
Tax credit sale receivable 0 8,125
Other current assets 2 2
Property, plant and equipment, net 99,018 97,363
Operating lease right-of-use assets 627 648
Other assets 6,074 6,057
Accounts payable 7,951 5,917
Current portion of long term debt 1,268 1,004
Short term borrowings 190 290
Other current liabilities 554 1,920
Other long term debt 47,397 47,803
Series A preferred units 126,759 126,593
Other long term liabilities $ 474 $ 475