NET LOSS PER SHARE - Dilutive Securities Excluded from Calculation of Diluted Earnings Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities excluded from calculation of diluted earnings per share	18,410,141	22,722,094	18,410,141	22,722,094
Stock Options Outstanding
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities excluded from calculation of diluted earnings per share	7,418,204	9,716,529	7,418,204	9,716,529
Warrants To Purchase Common Stock - Liability Classified
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities excluded from calculation of diluted earnings per share	2,036,733	2,156,153	2,036,733	2,156,153
Warrants To Purchase Common Stock - Equity Classified
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities excluded from calculation of diluted earnings per share	1,418,116	1,457,856	1,418,116	1,457,856
Unvested Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities excluded from calculation of diluted earnings per share	7,537,088	9,391,556	7,537,088	9,391,556