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4 - RELATED PARTY TRANSACTIONS (Details) - Immediate Family Member of Management or Principal Owner [Member] - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
4 - RELATED PARTY TRANSACTIONS (Details) [Line Items]        
Related Party Transaction, Amounts of Transaction $ 0 $ 6,000 $ 0 $ 12,000
Interest Paid, Including Capitalized Interest, Operating and Investing Activities $ 0 $ 3,000 $ 0 $ 9,000