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INVESTMENT SECURITIES
3 Months Ended
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
INVESTMENT SECURITIES Investment Securities
The amortized cost and gross unrealized gains (losses) of marketable investment securities accounted under the fair value method were as follows:
June 30, 2023
Amortized CostGross Unrealized GainsGross Unrealized (Losses)
Fair Value (1)
Corporate debt securities$21,840 $— $(1,400)$20,440 
U.S. treasury securities13,412 33 (544)12,901 
Certificates of deposit519 — — 519 
Total securities with unrealized gains/(losses)$35,771 $33 $(1,944)$33,860 
(1) Included within Investment securities in the Consolidated Balance Sheets.

March 31, 2023
Amortized CostGross Unrealized GainsGross Unrealized (Losses)
Fair Value (1)
Corporate debt securities$24,936 $$(1,325)$23,617 
U.S. treasury securities13,400 15 (425)12,990 
Common stock768 — (584)184 
Certificates of deposit518 — — 518 
Total securities with unrealized gains/(losses)$39,622 $21 $(2,334)$37,309 
(1) Included within Investment securities in the Consolidated Balance Sheets.

Scheduled maturities of the debt securities held by the Company included within the investment securities portfolio were as follows:
June 30, 2023March 31, 2023
Amortized CostEstimated Fair ValueAmortized CostEstimated Fair Value
Due within one year$4,910 $4,888 $6,243 $6,254 
Due within years two through five30,861 28,972 33,379 31,055 
Total debt within the investment securities portfolio$35,771 $33,860 $39,622 $37,309