SIGNIFICANT ACCOUNTING POLICIES (Activity for allowance for credit losses) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Balance Beginning	$ 1,245	$ 0	$ 0
Provision for expected credit losses	62	1,245	0
Write-offs charged against the allowance	(1,116)
Recoveries of amounts previously written off	(129)
Balance Ending	$ 62	$ 1,245	$ 0