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DEBT OBLIGATIONS - Credit Facility (Details) - USD ($)
12 Months Ended
Nov. 18, 2021
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Deferred mortgage costs   $ 1,277,000 $ 880,000
Line of Credit | Valley National Bank | Credit Facility, Maturing April 2021 | Secured debt      
Debt Instrument [Line Items]      
Debt face amount $ 35,000,000 $ 35,000,000 15,000,000
Debt used for operating expenses $ 15,000,000    
Effective interest rate   3.50%  
Commitment fee percentage   0.25%  
Outstanding balance   $ 0 0
Interest expense, debt   101,000 96,000
Deferred mortgage costs   $ 270,000 $ 12,000
Line of Credit | Valley National Bank | Credit Facility, Maturing April 2021 | Secured debt | Prime Rate      
Debt Instrument [Line Items]      
Margin interest above reference rate 0.25%    
Line of Credit | Valley National Bank | Credit Facility, Maturing April 2021 | Secured debt | Base Rate      
Debt Instrument [Line Items]      
Margin interest above reference rate 3.50%