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SIGNIFICANT ACCOUNTING POLICIES - Impacts of the Coronavirus ("Covid-19") Pandemic (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Apr. 30, 2020
Dec. 31, 2020
Debt Instrument [Line Items]    
Wage subsidy, CARES Act   $ 0.2
Paycheck Protection Program, CARES Act    
Debt Instrument [Line Items]    
Proceeds from long-term lines of credit $ 4.3