Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	$ 254,929	$ 301,753
Total assets measured at fair value	255,597	302,421
Radionetics Warrant
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total assets measured at fair value	668	668
Level 1
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	80,292	93,879
Total assets measured at fair value	80,292	93,879
Level 1 | Radionetics Warrant
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total assets measured at fair value	0	0
Level 2
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	174,637	207,874
Total assets measured at fair value	174,637	207,874
Level 2 | Radionetics Warrant
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total assets measured at fair value	0	0
Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	0	0
Total assets measured at fair value	668	668
Level 3 | Radionetics Warrant
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total assets measured at fair value	668	668
U.S. Government and Agency Obligations [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	126,474	152,730
U.S. Government and Agency Obligations [Member] | Level 1
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	80,292	93,879
U.S. Government and Agency Obligations [Member] | Level 2
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	46,182	58,851
U.S. Government and Agency Obligations [Member] | Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	0	0
Certificates of Deposit [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	4,076	4,535
Certificates of Deposit [Member] | Level 1
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	0	0
Certificates of Deposit [Member] | Level 2
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	4,076	4,535
Certificates of Deposit [Member] | Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	0	0
Corporate Debt Securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	124,379	142,994
Corporate Debt Securities [Member] | Level 1
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	0	0
Corporate Debt Securities [Member] | Level 2
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	124,379	142,994
Corporate Debt Securities [Member] | Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities	$ 0	0
Asset-backed securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities		1,494
Asset-backed securities [Member] | Level 1
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities		0
Asset-backed securities [Member] | Level 2
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities		1,494
Asset-backed securities [Member] | Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Total Investment securities		$ 0