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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:      
Net loss $ (6,756) $ (5,508) $ (10,837)
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation and amortization 9,041 9,271  
Stock-based compensation expense 530 0  
Bad debt expense 144 80  
Gain on disposal of fixed assets (283) (16)  
Gain on extinguishment of debt 0 (111)  
Income from equity investment in joint venture (2,705) (1,257)  
Distributions from equity investment in joint venture 2,054 0  
Deferred compensation costs 59 0  
Change in operating assets and liabilities, net of acquisitions:      
Accounts receivable (328) (897)  
Due to related parties 0 131  
Inventories (54) (34)  
Prepaid expenses and other current assets 87 523  
Accounts payable and accrued liabilities (575) 1,741  
Other 122 188  
Net cash provided by operating activities 1,336 4,111  
Cash flows from investing activities:      
Acquisition of fixed assets (768) (2,116)  
Proceeds from sales of fixed assets 512 138  
Net cash used in investing activities (256) (3,243)  
Cash flows from financing activities:      
Proceeds on long-term borrowings 1,224 0  
Payments on long-term borrowings (1,000) 0  
Proceeds on long-term borrowings from related parties 0 5,000  
Payments on long-term borrowings from related parties (3,440) (3,159)  
Proceeds on long-term borrowings 776 767  
Payments on short-term notes payable (752) (668)  
Other financing activities, net (10) 0  
Net cash provided by (used in) financing activities (3,202) 1,940  
Effect of exchange rate changes on cash (43) (76)  
Net increase (decrease) in cash and cash equivalents (2,165) 2,732  
Cash and cash equivalents, beginning of period 3,979 1,247  
Cash and cash equivalents, end of period 1,814 3,979 $ 1,247
Supplemental disclosure of cash flow information:      
Interest paid 910 1,208  
Income taxes paid 210 93  
Non-cash investing and financing activities:      
Extinguishment of long-term debt through issuance of common stock 0 6,889  
American Electric      
Cash flows from investing activities:      
Acquisition, net of cash received 0 611  
Diversenergy, LLC      
Cash flows from investing activities:      
Acquisition, net of cash received $ 0 $ (1,876)