EQUITY FINANCING - Additional Information (Detail) - USD ($)			6 Months Ended	12 Months Ended
	Jan. 07, 2021	Jan. 04, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 31, 2019
Underwriters | Common Stock
Subsidiary Sale Of Stock [Line Items]
Underwriting agreement date		Jan. 04, 2021
Stock issued during period		11,856,500
Sale of stock, price		$ 4.85
Aggregate proceeds from issuance of common stock	$ 53,500,000
At The Market Offering Program January 2019
Subsidiary Sale Of Stock [Line Items]
Maximum common stock saleable shares, value	$ 42,900,000
At The Market Offering Program January 2019 | Maximum
Subsidiary Sale Of Stock [Line Items]
Maximum aggregate offering price						$ 250,000,000.0
Maximum common stock saleable shares, value						$ 100,000,000.0
At The Market Offering Program January 2019 | Common Stock
Subsidiary Sale Of Stock [Line Items]
Stock issued during period			0	0	0