| Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
| | | Shares
available for
Grant | | | Number of
Options Outstanding | | | Weighted
Average
Exercise price
per share | | | Weighted
Average
Remaining
Contractual
Term in Years | |
| Balance, December 31, 2021 | | | 1,257,334 | | | | 192,898 | | | $ | 8.46 | | | | 6.76 | |
| Balance, June 30, 2022 | | | 1,257,334 | | | | 192,898 | | | $ | 8.46 | | | | 6.27 | |
| Balance at June 30, 2022 | | | | | | | 192,898 | | | $ | 8.46 | | | | 6.27 | |
| | | | | | | | | | | | | | | | | |
| Options exercisable at June 30, 2022 | | | | | | | 112,744 | | | $ | 11.51 | | | | 4.30 | |
|
| | | Shares Available for Grant | | | Number of Options
Outstanding | | | Weighted Average Exercise Price per Share | |
| Balance, December 31, 2019 | | | 343,871 | | | | 112,932 | | | $ | 15.37 | |
| Options authorized | | | 461,587 | | | | — | | | $ | — | |
| Options cancelled | | | 47,461 | | | | (47,461 | ) | | $ | — | |
| Effect of plan amendment on business combination | | | (391,332 | ) | | | — | | | $ | — | |
| Balance, December 31, 2020 | | | 461,587 | | | | 65,471 | | | $ | 16.86 | |
| Options authorized | | | 923,174 | | | | — | | | $ | — | |
| Options granted | | | (127,427 | ) | | | 127,427 | | | $ | 4.14 | |
| Balance, December 31, 2021 | | | 1,257,334 | | | | 192,898 | | | $ | 8.46 | |
| Vested and expected to vest, December 31, 2021 | | | | | | | 192,898 | | | $ | 8.46 | |
|