v3.26.1
Stock-Based Awards - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units [Member]
shares in Thousands
6 Months Ended
Mar. 31, 2026
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested, beginning balance | shares 408
Granted | shares 172
Vested | shares (148)
Cancelled | shares (12)
Unvested, ending balance | shares 420
Weighted Average Grant Date Fair Value, Unvested beginning balance | $ / shares $ 24.15
Weighted Average Grant Date Fair Value, Granted | $ / shares 13.66
Weighted Average Grant Date Fair Value, Vested | $ / shares 34.02
Weighted Average Grant Date Fair Value, Cancelled | $ / shares 32.69
Weighted Average Grant Date Fair Value, Unvested ending balance | $ / shares $ 16.16