Employee Benefit Plans - Stock-based compensation (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Employee Benefit Plans | ||
| Total stock-based compensation | $ 273,000 | $ 309,000 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||
| Employee Benefit Plans | ||
| Total stock-based compensation | 55,000 | |
| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense | ||
| Employee Benefit Plans | ||
| Total stock-based compensation | $ 218,000 | $ 309,000 |