STOCK-BASED COMPENSATION Outstanding Unvested Restricted Stock Unit Awards (Details)	9 Months Ended
	Sep. 30, 2018 shares
Restricted Stock Units
Unvested Shares
Outstanding at beginning of period (in shares)	337,423
Granted (in shares)	373,175
Vested (in shares)	0
Cancelled (in shares)	(46,000)
Outstanding at end of period (in shares)	664,598
Performance Shares
Unvested Shares
Outstanding at beginning of period (in shares)	17,557
Granted (in shares)	229,646
Vested (in shares)	0
Cancelled (in shares)	(5,000)
Outstanding at end of period (in shares)	242,203
Existing Employees [Member] | Performance Shares
Unvested Shares
Granted (in shares)	229,646