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INVESTMENT SECURITIES
9 Months Ended
Dec. 31, 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:
December 31, 2023
Amortized CostGross Unrealized GainsGross Unrealized (Losses)
Fair Value (1)
Corporate debt securities$21,790 $16 $(893)$20,913 
U.S. treasury securities14,103 148 (323)13,928 
Certificates of deposit526 — — 526 
Total securities with unrealized gains/(losses)$36,419 $164 $(1,216)$35,367 

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 

Scheduled maturities of the debt securities held by the Company included within the investment securities portfolio were as follows:
December 31, 2023March 31, 2023
Amortized CostEstimated Fair ValueAmortized CostEstimated Fair Value
Due within one year$5,364 $5,332 $6,243 $6,254 
Due within years two through five31,055 30,035 33,379 31,055 
Total debt within the investment securities portfolio$36,419 $35,367 $39,622 $37,309