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Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Cash and cash equivalents $ 2,667 $ 4,313
Accounts receivable 8,633 1,264
Inventory Valuation Reserves 1,040 1,040
Prepaid expenses 3,347 4,248
Other current assets 3,462 3,653
Property, plant and equipment, net 195,108 180,441
Operating lease right-of-use assets 2,056 2,449
Other assets 9,842 6,088
Accounts payable 32,132 26,168
Current portion of long term debt 13,585 12,465
Short term borrowings 23,443 36,754
Current portion of operating lease liability 406 338
Other current liabilities 10,302 8,474
Other long term debt 51,717 11,678
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 113,200 116,000
Operating lease liability $ 1,783 $ 2,189
Series B Preferred Stock, Authorized (in shares) 65,000  
Series B Preferred Stock, Shares Issued (in shares) 0 1,270
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) 40,966 35,869
Common Stock, Shares Outstanding (in shares) 40,966 35,869
Series B Convertible Preferred Stock [Member]    
Series B Preferred Stock, Par Value (in dollars per share) $ 0.001 $ 0.001
Series B Preferred Stock, Authorized (in shares) 7,235 7,235
Series B Preferred Stock, Shares Issued (in shares) 0 1,270
Series B Preferred Stock, Shares Outstanding (in shares) 0 1,270
Aggregate Liquidation Preference $ 0 $ 3,810
Convertible Series A Preferred Stock Subject to Mandatory Redemption [Member]    
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 113,189 116,000
Variable Interest Entity, Primary Beneficiary [Member]    
Cash and cash equivalents 1,093 165
Accounts receivable 55 165
Prepaid expenses 1,438 858
Other current assets 289 725
Property, plant and equipment, net 81,966 71,633
Operating lease right-of-use assets 145 224
Other assets 4,881 3,458
Accounts payable 3,815 9,192
Current portion of long term debt 190 0
Short term borrowings 9 19,831
Current portion of operating lease liability 48 41
Other current liabilities 0 645
Other long term debt 40,857 31
Operating lease liability 67 115
Variable Interest Entity, Primary Beneficiary [Member] | Convertible Series A Preferred Stock Subject to Mandatory Redemption [Member]    
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent $ 113,189 $ 116,000