ACCOUNTS RECEIVABLE (Schedule Of Changes In Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
ACCOUNTS RECEIVABLE [Abstract]
Balance, beginning of period	$ 1,531	$ 439	$ 439
Write-off			(76)
Current provision (recovery)	$ 417	$ 6	1,168
Balance, end of period	$ 1,965		$ 1,531