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BASIS OF PRESENTATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
May 13, 2020
Jul. 31, 2018
Jun. 30, 2020
Apr. 15, 2020
Dec. 31, 2019
Description of Business          
Revenue as a percentage of sales associated with new wind turbine installations     72.00%    
Liquidity          
Total debt and capital lease obligations     $ 25,347    
Obligation to make principal payments on outstanding debt during the next twelve months     14,078    
Outstanding indebtedness under the Credit Facility     $ 12,107    
Common stock, par value (in dollars per share)   $ 0.001 $ 0.001   $ 0.001
Sales agent commission percentage     3.00%    
ATM common stock available for issuance     $ 9,967    
Long-term Debt     $ 342   $ 342
Paycheck Protection Program loan          
Liquidity          
Long-term Debt       $ 9,530  
Repayments of Debt $ 379        
Minimum          
Liquidity          
Number of months cash resources adequate to meet Company's liquidity needs     12 months    
Maximum          
Liquidity          
Proceeds from issuance of stock   $ 10,000