COMMON STOCKHOLDERS' EQUITY (Details) - USD ($)			12 Months Ended
	Oct. 31, 2019	Jan. 01, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued (in shares)			53,715,569	50,333,655
Common stock, shares outstanding (in shares)			53,715,569	50,333,655
Issuance of common stock, related expenses			$ 6,600,000	$ 4,400,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued (in shares)			37,460	43,332	35,281
Percent of market value discount		90.00%
Maximum payroll deduction		10.00%
Maximum number of shares per employee (in shares)		2,000
Maximum value of shares per employee		$ 25,000
Issuance of common stock, related expenses					$ 200,000
Equity Distribution Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares, sold (in shares)			3,286,865	1,710,779
Proceeds from sale of common stock			$ 195,900,000	$ 81,800,000
Payments for commissions			2,000,000	800,000
Equity issuance costs			$ 200,000	$ 100,000
Maximum | Equity Distribution Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of common stock, gross sales price	$ 300,000,000