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LEASES - Future Minimum Lease Payments (Details) - USD ($)
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Operating leases, estimated future minimum lease payments      
Remainder of 2019 $ 201,000    
2020 242,000    
2021 241,000    
2022 47,000    
2023 35,000    
Thereafter 17,000    
Total lease obligations 783,000    
Less: Amount representing interest (92,000)    
Present value of net minimum lease obligations 691,000 $ 750,000  
Less, current portion (221,000)    
Long term portion 470,000    
Finance leases, estimated future minimum lease payments      
Remainder of 2019 53,000    
2020 46,000    
2021 38,000    
2022 32,000    
2023 27,000    
Thereafter 41,000    
Total lease obligations 237,000    
Less: Amount representing interest (39,000)    
Finance Lease, Liability, Total 198,000    
Less, current portion (58,000)   $ (57,000)
Long term portion 140,000   $ 155,000
Remainder of 2019 254,000    
2020 288,000    
2021 279,000    
2022 79,000    
2023 62,000    
Thereafter 58,000    
Total lease obligations 1,020,000    
Less: Amount representing interest (131,000)    
Total lease liabilities 889,000    
Less, current portion (279,000)    
Long term portion $ 610,000