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Stock-Based Compensation and Stock Options (Details) - Stock Options $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
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May 29, 2020 $ / shares shares | Sep. 30, 2019 $ / shares shares | May 31, 2019 installment $ / shares shares | Jun. 30, 2018 $ / shares shares | May 31, 2018 $ / shares shares | Oct. 31, 2017 $ / shares shares | Sep. 30, 2015 $ / shares shares | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) shares | Sep. 30, 2019 USD ($) | Dec. 31, 2019 shares | Dec. 31, 2015 shares
September 2015 Plan | Mr. Ralph Bartel |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  |  |  |  |  |  | 400,000 |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 8.07 |  |  |  |  |  |
October 2017 Plan | Mr. Ralph Bartel |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  |  |  |  |  | 400,000 |  |  |  |  |  |  | 150,000
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  |  |  |  |  | $ 6.95 |  |  |  |  |  |  |
Options exercised (in shares) |  |  |  |  |  |  |  |  |  |  |  | 250,000 |
September 2019 Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  | $ 10.79 |  |  |  |  |  |  |  |  |  |  |
Options vested and become exercisable annually (in shares) |  | 75,000 |  |  |  |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  | $ (362) |  | $ (523) |  |  |
Unrecognized stock-based compensation expense | $ |  |  |  |  |  |  |  | 1,400 |  | $ 1,400 |  |  |
Expected duration for recognition of stock based compensation expense |  |  |  |  |  |  |  |  |  | 2 years 10 months 24 days |  |  |
Options forfeited (in shares) |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
September 2019 Plan | Mr. Ralph Bartel |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  | $ 10.79 |  |  |  |  |  |  |  |  |  |  |
Options vested and become exercisable annually (in shares) |  | 400,000 |  |  |  |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  | (382) |  | $ (3,900) |  |  |
Unrecognized stock-based compensation expense | $ |  |  |  |  |  |  |  | 1,900 |  | $ 1,900 |  |  |
Expected duration for recognition of stock based compensation expense |  |  |  |  |  |  |  |  |  | 1 year 2 months 12 days |  |  |
September 2019 Plan | Key Employees |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  | 50,000 |  |  |  |  |  |  |  |  |  |  |
May 2020 Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
Share price (in dollars per share) | $ / shares | $ 3.49 |  |  |  |  |  |  |  |  |  |  |  |
Shares issued upon exercise of options (in shares) | 300,000 |  |  |  |  |  |  |  |  |  |  |  |
May 2020 Plan | Mr. Ralph Bartel |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) | 800,000 |  |  |  |  |  |  |  |  |  |  | 1,900,000 |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares | $ 3.49 |  |  |  |  |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  | (385) |  | $ (771) |  |  |
Unrecognized stock-based compensation expense | $ |  |  |  |  |  |  |  | $ 2,300 |  | 2,300 |  |  |
Expected duration for recognition of stock based compensation expense |  |  |  |  |  |  |  | 1 year 6 months |  |  |  |  |
May 2020 Plan | Key Employees |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) | 200,000 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares | $ 3.49 |  |  |  |  |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  | $ (59) |  | (79) |  |  |
Unrecognized stock-based compensation expense | $ |  |  |  |  |  |  |  | 707 |  | $ 707 |  |  |
Expected duration for recognition of stock based compensation expense |  |  |  |  |  |  |  |  |  | 3 years 6 months |  |  |
May 2018 Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  |  |  |  | 50,000 |  |  |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  |  |  |  | $ 14.70 |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  | $ 0 | $ (22) | $ (34) | $ (67) |  |
Options forfeited (in shares) |  |  |  |  |  |  |  |  |  | 25,000 |  |  |
June 2018 Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  |  |  | 50,000 |  |  |  |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  |  |  | $ 16.65 |  |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  |  | $ (21) | $ (43) | $ (53) |  |
Options forfeited (in shares) |  |  |  |  |  |  |  |  |  | 37,500 |  |  |
May 2019 Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Employee options granted to purchase shares of common stock (in shares) |  |  | 100,000 |  |  |  |  |  |  |  |  |  |
Exercise price of employee option shares of common stock (in dollars per share) | $ / shares |  |  | $ 19.28 |  |  |  |  |  |  |  |  |  |
Total stock-based compensation expense (reversal) | $ |  |  |  |  |  |  |  |  |  | $ (107) |  |  |
Options forfeited (in shares) |  |  |  |  |  |  |  |  |  | 75,000 |  |  |
Number of installments | installment |  |  | 3 |  |  |  |  |  |  |  |  |  |
Options canceled (in shares) |  |  |  |  |  |  |  |  |  | 25,000 |  |  |
May 2019 Plan | September 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and exercisable in future periods (in shares) |  |  | 15,000 |  |  |  |  |  |  |  |  |  |
May 2019 Plan | May 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested (in shares) |  |  | 10,000 |  |  |  |  |  |  |  |  |  |
May 2019 Plan | Tranche One |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and exercisable in future periods (in shares) |  |  | 25,000 |  |  |  |  |  |  |  |  |  |
May 2019 Plan | Tranche Two |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and exercisable in future periods (in shares) |  |  | 25,000 |  |  |  |  |  |  |  |  |  |
May 2019 Plan | Tranche Three |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and exercisable in future periods (in shares) |  |  | 25,000 |  |  |  |  |  |  |  |  |  |

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