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NATURE OF OPERATIONS - Leased Property (Details)
9 Months Ended
Sep. 30, 2021
Lessor, Description Of Leases [Line Items]  
Notice period for lease termination 30 days
Termination fees as a percentage of remaining lease payments 10.00%
Number of month's rent to be paid 6 months
Notice period for purchase of property 30 days
Extended term of lease 48 months
Notice period for exercise of renewal extension 6 months
Useful life 15 years
Minimum  
Lessor, Description Of Leases [Line Items]  
Term of lease agreement 96 months
Maximum  
Lessor, Description Of Leases [Line Items]  
Term of lease agreement 120 months