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Consolidated Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Cash and cash equivalents $ 251 $ 7,751
Allowance For Doubtful Accounts 0 1,404
Inventory Valuation Reserves 1,040 1,040
Prepaid expenses 3,671 5,598
Property, plant and equipment, net 169,485 135,101
Operating lease right-of-use assets 2,227 2,462
Other assets 3,112 2,575
Accounts payable 32,938 16,415
Short term borrowings 18,816 14,586
Accrued property taxes 1,028 6,830
Current portion of operating lease liability 267 260
Other current liabilities 6,448 5,872
Other long term debt $ 11,876 $ 12,038
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) 35,043 33,461
Common Stock, Shares Outstanding (in shares) 35,043 33,461
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) 1,270 1,275
Series B Preferred Stock, Shares Outstanding (in shares) 1,270 1,275
Aggregate Liquidation Preference $ 3,810 $ 3,825
Convertible Series A Preferred Stock Subject to Mandatory Redemption [Member]    
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Current 109,401 3,169
Convertible Series B Preferred Stock Subject to Mandatory Redemption [Member]    
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Current 3,992 3,806
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 0 44,978
Variable Interest Entity, Primary Beneficiary [Member]    
Cash and cash equivalents 0 19
Prepaid expenses 223 335
Property, plant and equipment, net 63,961 39,625
Operating lease right-of-use assets 0 10
Other assets 584 38
Accounts payable 11,545 4,950
Short term borrowings 9 9
Accrued property taxes 0 121
Current portion of operating lease liability 6 11
Other current liabilities 442 306
Other long term debt 33 40
Variable Interest Entity, Primary Beneficiary [Member] | Convertible Series B Preferred Stock Subject to Mandatory Redemption [Member]    
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent $ 0 $ 44,978