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STOCKHOLDERS' EQUITY - Narrative (Detail) - Jefferies LLC - At-The-Market Offering Agreement - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 31, 2021 | Aug. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock offering program, maximum value |  | $ 150.0 |  |
Issuance of common stock under public offering, net of issuance costs (in shares) |  |  | 770,465 | 1,805,227
Consideration received on transaction |  |  | $ 9.1 | $ 24.7
Prepaid Expenses and Other Current Assets | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Consideration received on transaction | $ 2.5 |  |  |

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