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Stock Incentive Plans - Employee Stock Purchase Plan (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized and reserved for future issuance (in shares)	13,215,543		13,215,543
Stock‑based compensation expense	$ 1,695,000	$ 2,321,000	$ 4,717,000	$ 8,380,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized and reserved for future issuance (in shares)	45,795		45,795		5,769
Stock‑based compensation expense	$ 0	$ 100,000	$ 0	$ 100,000

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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