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CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Allowance for doubtful accounts $ 1,404,000 $ 1,260,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized (in thousands) 40,000,000 40,000,000
Common stock, shares issued (in thousands) 31,572,000 22,830,000
Common stock, shares outstanding (in thousands) 31,572,000 22,830,000
Series B Convertible Preferred Stock    
Series B preferred stock, par value $ 0.001 $ 0.001
Series B preferred stock, authorized (in thousands) 7,235,000 7,235,000
Series B preferred stock, shares issued (in thousands) 1,323,000 1,323,000
Series B preferred stock, shares outstanding (in thousands) 1,323,000 1,323,000
Aggregate liquidation preference $ 3,969,000 $ 3,969,000
Variable Interest Entity, Primary Beneficiary [Member]    
Cash and cash equivalents, VIE 117,000 235,000
Prepaid expenses, VIE 78,000 192,000
Other current assets, VIE 0 741,000
Property, plant and equipment, VIE 29,481,000 22,628,000
Operating lease right-of-use assets, VIE 19,000 28,000
Other assets, VIE 24,000 24,000
Accounts payable, VIE 7,005,000 6,271,000
Current portion of operating lease liability, VIE 16,000 10,000
Other current liabilities, VIE 506,000 129,000
Other long term debt, VIE 45,000 0
Series A preferred units, VIE 42,210,000 32,022,000
Operating lease liability, VIE 0 11,000
Other long term liabilities, VIE 127,000 74,000
Current portion of Series A preferred units, VIE $ 1,566,000 $ 2,015,000