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Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Cash and cash equivalents $ 898 $ 2,667
Accounts receivable 1,805 8,633
Inventories 25,442 18,291
Inventory Valuation Reserves   1,040
Prepaid expenses 1,842 3,347
Tax credit sale receivable 12,300 0
Other current assets 2,409 3,462
Property, plant and equipment, net 199,392 195,108
Operating lease right-of-use assets 2,237 2,056
Other assets 12,977 9,842
Accounts payable 33,139 32,132
Current portion of long term debt 63,745 13,585
Short term borrowings 26,789 23,443
Other current liabilities 20,295 15,229
Other long term debt 56,201 51,717
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 126,593 113,189
Other long term liabilities $ 5,142 $ 5,112
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) 51,139 40,966
Common Stock, Shares Outstanding (in shares) 51,139 40,966
Variable Interest Entity, Primary Beneficiary [Member]    
Cash and cash equivalents $ 0 $ 1,093
Accounts receivable 57 55
Inventories 157 0
Prepaid expenses 85 1,438
Tax credit sale receivable 8,125 0
Other current assets 2 289
Property, plant and equipment, net 97,363 81,966
Operating lease right-of-use assets 648 145
Other assets 6,057 4,881
Accounts payable 5,917 3,815
Current portion of long term debt 1,004 190
Short term borrowings 290 9
Other current liabilities 1,920 48
Other long term debt 47,803 40,857
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 126,593 113,189
Other long term liabilities $ 475 $ 67