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DISPOSED AND DISCONTINUED OPERATIONS - Disposed Operations (Details) - Grid Tied Central Solar Inverter Services Business[Member] - Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] - Bold Renewables Holdings, LLC [Member] - USD ($)
 11 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
May 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Consideration from disposed operations     $ 1.00
Loan $ 5,300,000    
Non-cash gain, net of tax expense, from discontinued operations   $ 8,600,000  
Continuing Operations [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposed operations of extended warranty service obligation   22,000,000.0  
Non cash gain from continuing operations   14,800,000  
Discontinued Operations [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposed operations of reduced liabilities held in discontinued operations   10,900,000  
Tax expense from discontinued operations   $ 2,400,000