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v3.21.1

SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 02, 2021 | Apr. 01, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Apr. 13, 2020
Subsequent Event [Line Items] |  |  |  |  |  |
Common stock, par value |  |  | $ 0.01 |  | $ 0.01 |
Proceeds from issuance of common stock |  |  | $ 1,260 | $ 1,350 |  |
Class of warrant, number of securities called by warrants |  |  | 905,901 |  |  |
Sales Agreement with Alliance Global Partners |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Maximum aggregate initial offering price |  |  |  |  |  | $ 50,000
Subsequent Events |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Proceeds from Issuance of Warrants |  | $ 400 |  |  |  |
Class Of Warrant Or Right Warrants Or Rights Exercised |  | 74,000 |  |  |  |
Class of warrant, number of securities called by warrants |  | 74,000 |  |  |  |
Subsequent Events | Sales Agreement with Alliance Global Partners |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Common stock, par value | $ 0.01 |  |  |  |  |
Proceeds from issuance of common stock | $ 15,400 |  |  |  |  |
Percentage of cash fee | 3.00% |  |  |  |  |
Sale of common stock | 4,501,000 |  |  |  |  |
Subsequent Events | Sales Agreement with Alliance Global Partners | Maximum |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Proceeds from issuance of common stock | $ 22,000 |  |  |  |  |

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