NATURE OF OPERATIONS - Additional Information (Detail) - USD ($)	Jul. 31, 2020	Dec. 31, 2019	Jul. 31, 2019
Nature Of Operations [Line Items]
Cash and cash equivalents	$ 75,887,000		$ 32,548,000
Working capital deficit	(26,400,000)
MidCap Credit Facility
Nature Of Operations [Line Items]
Credit facility, readily available borrowing capacity	4,400,000
Line of credit facility, maximum credit commitment		$ 12,500,000
Line of Credit | Cerberus Credit Facility
Nature Of Operations [Line Items]
Line of credit facility, maximum credit commitment	$ 25,000,000