SIGNIFICANT ACCOUNTING POLICIES (Activity for allowance for credit losses) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Balance Beginning	$ 1,245
Provision for expected credit losses	62	1,245
Write-offs charged against the allowance	(8)
Balance Ending	$ 1,299	$ 1,245