v3.26.1
Stockholders' Equity - Stock Based Compensation Expense by Function (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Total stock compensation expense $ 5,272 $ 3,512 $ 15,796 $ 9,522
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Total stock compensation expense 2,844 1,789 8,412 4,947
Location, Statement of Income, Balance [Axis]: us-gaap:SellingAndMarketingExpense        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Total stock compensation expense 1,602 1,142 4,935 3,016
Location, Statement of Income, Balance [Axis]: lqdt:TechnologyAndOperationsExpense        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Total stock compensation expense $ 826 $ 581 $ 2,449 $ 1,559