v3.26.3
Stock-Based Compensation - Additional Information1 (Details) - Restricted Stock Awards
$ in Millions
Sep. 30, 2026
USD ($)
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesNoncurrent  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Unvested RSAs $ 0.4
Location, Statement of Financial Position, Balance [Axis]: krsa:AccruedExpensesAndOtherLiabilitiesCurrent  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Unvested RSAs $ 0.2