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LEASES - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Lessee, Lease, Description [Line Items]        
Operating lease, weighted average remaining lease term (years) 8 years 9 months 25 days   8 years 9 months 25 days  
Operating lease, weighted average discount rate 3.35%   3.35%  
Operating lease, rent expense $ 200,000   $ 700,000  
Operating lease not yet commenced $ 0   $ 0  
Finance lease, weighted average remaining lease term (years) 10 years 5 months 12 days   10 years 5 months 12 days  
Finance lease, weighted average discount rate 3.39%   3.39%  
Finance lease not yet commenced $ 0   $ 0  
1365 New Scotland Road, Slingerlands, New York | Director        
Lessee, Lease, Description [Line Items]        
Operating lease, rent expense       $ 13,000
Monthly rent and common area maintenance expense     4,000  
Rent and common area maintenance expense     25,000 37,000
2 Rush Street, Schenectady, New York | Director        
Lessee, Lease, Description [Line Items]        
Operating lease, rent expense $ 25,000 $ 25,000    
Monthly rent and common area maintenance expense     8,000  
Rent and common area maintenance expense     $ 76,000 $ 76,000