DEBT - Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule Of Interest Expense [Line Items]
Term loan	$ 82	$ 148
Debt discount	12	20
Debt issue costs	5	10
Total interest expense	99	178
Less: interest income	0	1
Interest expense, net	$ 99	$ 177