v3.20.2

STOCKHOLDERS' EQUITY - Stock Options (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) | 0 | 0 | 0 | 0 |
Options |  |  |  |  |
Outstanding at period start (in shares) |  |  | 70,628 |  |
Exercised (in shares) |  |  | (41,370) |  |
Outstanding at period end (in shares) | 29,258 |  | 29,258 |  | 70,628
Weighted-Average Exercise Price |  |  |  |  |
Outstanding at period start, Weighted-Average Exercise Price (in dollars per share) |  |  | $ 30.97 |  |
Exercised, Weighted-Average Exercise Price (in dollars per share) |  |  | 30.97 |  |
Outstanding at period end, Weighted-Average Exercise Price (in dollars per share) | $ 30.97 |  | $ 30.97 |  | $ 30.97
Contractual Terms |  |  | 1 year 2 months 12 days |  | 1 year 2 months 12 days
Stock option |  |  |  |  |
Weighted-Average Exercise Price |  |  |  |  |
Vesting period |  |  | 3 years |  |
Stock-based compensation expense | $ 0 | $ 0 | $ 0 | $ 0 |

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