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Investments (Tables)
 9 Months Ended
Sep. 30, 2023
Investments [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Assets measured at fair value on a recurring basis were as follows (in thousands):
September 30, 2023
Quoted Price in Active Markets (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)Total
Assets:
Obligations of U.S. Government and its agencies$— $243,638 $— $243,638 
Corporate debt securities— 2,074 — 2,074 
Certificates of deposit— 973 — 973 
Total assets$— $246,685 $— $246,685 

December 31, 2022
Quoted Price in Active Markets (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)Total
Assets:
Obligations of U.S. Government and its agencies$— $129,371 $— $129,371 
Corporate debt securities— 6,092 — 6,092 
Certificates of deposit— 2,157 — 2,157 
Total assets$— $137,620 $— $137,620 
Fair Value of the Company's Investments by Type
The following tables summarize the fair value of the Company’s investments by type (in thousands):
September 30, 2023
Amortized
Cost		Accrued
Interest		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Obligations of U.S. Government and its agencies$243,810 $37 $3 $(212)$243,638 
Corporate debt securities2,068 6 — — 2,074 
Certificates of deposit980 6 — (13)973 
Total investments$246,858 $49 $3 $(225)$246,685 
December 31, 2022
Amortized
Cost		Accrued
Interest		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Obligations of U.S. Government and its agencies$129,940 $427 $— $(996)$129,371 
Corporate debt securities6,093 37 — (38)6,092 
Certificates of deposit2,163 23 — (29)2,157 
Total investments$138,196 $487 $— $(1,063)$137,620 
Schedule of the Maturity of Investments
The following table summarizes the scheduled maturity for the Company’s investments at September 30, 2023 and December 31, 2022 (in thousands):
September 30, 2023December 31, 2022
Maturing in one year or less$246,685 $119,543 
Maturing after one year through two years— 18,077 
Total investments$246,685 $137,620