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INVESTMENT SECURITIES
6 Months Ended
Sep. 30, 2024
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:
September 30, 2024
Amortized CostGross Unrealized GainsGross Unrealized (Losses)Fair Value
Corporate debt securities$39,088 $100 $(313)$38,875 
U.S. treasury securities17,385 219 (192)17,412 
Certificates of deposit542 — — 542 
Total securities with unrealized gains/(losses)$57,015 $319 $(505)$56,829 

March 31, 2024
Amortized CostGross Unrealized GainsGross Unrealized (Losses)Fair Value
Corporate debt securities$22,318 $$(685)$21,641 
U.S. treasury securities16,071 110 (348)15,833 
Certificates of deposit531 — — 531 
Total securities with unrealized gains/(losses)$38,920 $118 $(1,033)$38,005 

Scheduled maturities of the debt securities held by the Company included within the investment securities portfolio were as follows:
September 30, 2024March 31, 2024
Amortized CostEstimated Fair ValueAmortized CostEstimated Fair Value
Due within one year$30,473 $30,427 $7,592 $7,566 
Due within years two through five26,542 26,402 31,328 30,439 
Total debt within the investment securities portfolio$57,015 $56,829 $38,920 $38,005