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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

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