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SIGNIFICANT ACCOUNTING POLICIES (Details - Gain on Derivative) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Accounting Policies [Abstract]      
Derivative instrument, beginning balance $ 2,506 $ (370) $ (370)
Change in fair value of cash flow hedge, net of taxes (1,196)    
Change in fair value of cash flow hedge, net of taxes   $ 3,095 2,876
Derivative instrument, ending balance $ 1,310   $ 2,506