v3.20.2

SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 22, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Subsequent Event [Line Items] |  |  |  |  |  |
Accumulated deficit |  | $ 143,214,000 |  | $ 143,214,000 |  | $ 128,822,000
Impairment charges, indefinite-lived |  | 0 | $ 0 | 0 | $ 0 |
Impairment charges, finite-lived |  | $ 0 | $ 0 | $ 0 | $ 0 |
Follow-on Offering |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Common stock issued and sold | 1,600,000 |  |  |  |  |
Public offering price (in dollars per share) | $ 47.00 |  |  |  |  |
Aggregate gross proceeds | $ 75,200,000 |  |  |  |  |
Net proceeds | 70,207,000 |  |  |  |  |
Discounts and commissions | 4,512,000 |  |  |  |  |
Offering costs | $ 481,000 |  |  |  |  |

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