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Leases (Details) - Supplemental information regarding leases - USD ($)
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Balance Sheet:      
ROU assets $ 1,373,000 $ 1,463,000
Current lease liabilities 353,000 368,000
Non-current lease liabilities 1,054,000 1,127,000
Total lease liabilities $ 1,407,000    
Weighted average remaining lease term (years) 3 years 109 days    
Weighted average discount rate 9.00%    
Future minimum lease payments:      
2019 $ 367,000    
2020 336,000    
2021 342,000    
2022 348,000    
2023 295,000    
Thereafter    
Total 1,688,000    
Less: Imputed interest 281,000    
Total lease liabilities 1,407,000    
Less: Current lease liabilities 353,000 368,000
Long-term lease liabilities $ 1,054,000 $ 1,127,000