INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Corporate tax rate	21.00%	21.00%	35.00%
Federal net operating loss carryforward	$ 0
State net operating loss carryforward	$ 849
Minimum
Operating loss carryforward expiration	Dec. 31, 2019
Maximum
Operating loss carryforward expiration	Dec. 31, 2025

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

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