Stock-Based Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	23,716,137		24,996,827
Weighted average grant date fair value (in dollars per share)	$ 15.88	$ 7.10
Aggregate intrinsic value	$ 12,200	$ 1,100
Stock-based compensation costs related to unvested stock options	40,900
Stock-based compensation expense	$ 6,554	$ 2,492
2025 Performance Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	17,346,193
Annual increase in common stock available for issuance	5.00%
2025 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	1,233,964
Annual increase in common stock available for issuance	1.00%
Purchase price of common stock as percentage of fair market value	85.00%
Tranche Two Through Thirty-Seven [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting, percentage	0.02083%
Tranche One Through Forty-Eight [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	4 years
Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	10,227,211		10,003,254
Share-based payment award, expiration period (in years)	10 years
Vesting period	4 years
Weighted-average period (in years)	3 years 3 months 21 days
Options to Purchase Common Stock [Member] | Tranche One Through Thirty-Seven [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	4 years
Options to Purchase Common Stock [Member] | Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting, percentage	25.00%
Incentive Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Threshold of voting power in company that triggers increase in minimum exercise price of share based payment awards	10.00%
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	1,840,421		907,703
Vesting period	4 years
Weighted-average period (in years)	3 years 9 months
Unrecognized compensation costs	$ 42,400
ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted-average period (in years)	5 months 8 days
Unrecognized compensation costs	$ 1,100
Minimum [Member] | Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, purchase price of common stock, percentage	100.00%
Maximum [Member] | Incentive Stock Options [Member] | Employee Who Owns More Than Ten Percent Of Voting Power Of All Classes Of Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, purchase price of common stock, percentage	110.00%