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LEASE LIABILITIES AND RIGHT OF USE ASSETS - Future minimum operating lease payments (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
LEASE LIABILITIES AND RIGHT OF USE ASSETS      
2020 $ 192,000    
2021 262,000    
2022 257,000    
2023 118,000    
2024 81,000    
Total minimum lease payments 910,000    
Less: present value discount (96,000)    
Present value of minimum lease payments 814,000 $ 864,000 $ 568,000
Current portion of operating lease obligations 214,000 209,000  
Operating lease obligations, less current portion $ 600,000 $ 655,000