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Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Cash and cash equivalents $ 4,313 $ 7,751
Allowance For Doubtful Accounts 0 1,404
Accounts receivable, net of allowance for doubtful accounts 1,264 1,574
Inventory Valuation Reserves 1,040 1,040
Prepaid expenses 4,248 5,598
Other current assets 3,653 644
Property, plant and equipment, net 180,441 135,101
Operating lease right-of-use assets 2,449 2,462
Other assets 6,088 2,575
Accounts payable 26,168 16,415
Short term borrowings 36,754 14,586
Accrued property taxes 1,206 6,830
Current portion of operating lease liability 338 260
Other current liabilities 7,268 5,872
Other long term debt 11,678 12,038
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 116,000 45,000
Operating lease liability $ 2,189 $ 2,318
Series B Preferred Stock, Authorized (in shares) 65,000  
Series B Preferred Stock, Shares Issued (in shares) 1,270 1,275
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) 35,869 33,461
Common Stock, Shares Outstanding (in shares) 35,869 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 0 3,169
Convertible Series B Preferred Stock Subject to Mandatory Redemption [Member]    
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Current 4,082 3,806
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent 116,000 44,978
Variable Interest Entity, Primary Beneficiary [Member]    
Cash and cash equivalents 165 19
Accounts receivable, net of allowance for doubtful accounts 165 0
Prepaid expenses 858 335
Other current assets 725 0
Property, plant and equipment, net 71,633 39,625
Operating lease right-of-use assets 224 10
Other assets 3,458 38
Accounts payable 9,192 4,950
Short term borrowings 19,831 9
Accrued property taxes 0 121
Current portion of operating lease liability 41 11
Other current liabilities 645 306
Other long term debt 31 40
Operating lease liability 115 0
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 $ 116,000 $ 44,978