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EQUITY - Stock options (Detail) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Nov. 22, 2019 employee | Oct. 16, 2019 | Nov. 30, 2019 $ / shares shares | Oct. 31, 2019 $ / shares shares | Sep. 30, 2018 employee $ / shares shares | Aug. 31, 2017 $ / shares shares | Jul. 31, 2017 employee shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares | Nov. 01, 2019 employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | $ |  |  |  |  |  |  |  | $ 130 | $ 56 | $ 138 | $ 111 |
Stock options |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock options valuation method |  |  |  |  |  |  |  |  |  | Black-Scholes valuation model |  |
Stock options granted (in shares) |  |  |  |  | 400,000 |  |  |  |  | 340,760 | 400,000 |
Number of employees | employee | 11 |  |  |  | 102 |  | 11 |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  | $ 8.75 |  |  |  |  |  |  |
Stock-based compensation | $ |  |  |  |  |  |  |  | $ 1,100 | $ 300 | $ 1,400 | $ 400 |
Stock options | 2018 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  | 0.33% |  |  |  |  |  |  |  |  |  |
Stock options | 2019 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  | 0.33% |  |  |  |  |  |  |  |  |  |
Stock options | 2020 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  | 0.33% |  |  |  |  |  |  |  |  |  |
Employee | Stock options |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock options granted (in shares) |  |  | 110,000 |  |  |  | 135,000 |  |  |  |  |
Number of employees | employee |  |  |  |  |  |  |  |  |  |  |  | 11
Exercise price (in dollars per share) | $ / shares |  |  | $ 6.28 |  |  |  |  |  |  |  |  |
Employee | Stock options | 2018 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage | 0.33% |  |  |  |  |  | 0.33% |  |  |  |  |
Employee | Stock options | 2019 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage | 0.33% |  |  |  |  |  | 0.33% |  |  |  |  |
Employee | Stock options | 2020 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage | 0.33% |  | 0.33% |  |  |  | 0.33% |  |  |  |  |
Employee | Stock options | 2021 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  | 0.33% |  |  |  |  |  |  |  |  |
Employee | Stock options | 2022 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  | 0.33% |  |  |  |  |  |  |  |  |
Chief Executive Officer (CEO) | Stock options |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock options granted (in shares) |  |  |  | 225,000 |  | 19,047 |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  | $ 7.11 |  | $ 5.25 |  |  |  |  |  |
Exercised (in shares) |  |  |  |  |  |  |  | 274,267 |  |  |  |
Chief Financial Officer (CFO) | Stock options |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock options granted (in shares) |  |  |  |  |  | 25,000 |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  | $ 5.25 |  |  |  |  |  |
Chief Financial Officer (CFO) | Stock options | 2018 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  | 0.33% |  |  |  |  |  |
Chief Financial Officer (CFO) | Stock options | 2019 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  | 0.33% |  |  |  |  |  |
Chief Financial Officer (CFO) | Stock options | 2020 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  | 0.33% |  |  |  |  |  |

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