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Investment Securities (Tables)
 9 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Unrealized Gain (Loss) on Investments The following tables set forth the amortized cost and fair value of securities available-for-sale and held-to-maturity at December 31, 2022 and March 31, 2022:
At December 31, 2022
AmortizedGross Unrealized
$ in thousandsCostGainsLossesFair Value
Available-for-Sale:    
Mortgage-backed Securities:    
Government National Mortgage Association$347 $— $4 $343 
Federal Home Loan Mortgage Corporation22,012 — 4,518 17,494 
Federal National Mortgage Association11,868 — 2,357 9,511 
Total mortgage-backed securities34,227 — 6,879 27,348 
U.S. Government Agency Securities9,860 — 38 9,822 
Corporate Bonds5,269 — 2,324 2,945 
Muni Securities17,724 — 4,496 13,228 
Asset-backed Securities101 — 1 100 
Total available-for-sale$67,181 $— $13,738 $53,443 
Held-to-Maturity:    
Mortgage-backed Securities:    
Government National Mortgage Association$384 $— $8 $376 
Federal National Mortgage Association and Other2,022 — 116 1,906 
Total held-to maturity$2,406 $— $124 $2,282 

At March 31, 2022
AmortizedGross Unrealized
$ in thousandsCostGainsLossesFair Value
Available-for-Sale:    
Mortgage-backed Securities:    
Government National Mortgage Association$439 $9 $— $448 
Federal Home Loan Mortgage Corporation23,744 — 2,197 21,547 
Federal National Mortgage Association12,852 — 1,268 11,584 
Total mortgage-backed securities37,035 9 3,465 33,579 
U.S. Government Agency Securities13,864 — 79 13,785 
Corporate Bonds5,271 — 1,150 4,121 
Muni Securities17,741 — 1,973 15,768 
Asset-backed Securities347 — 4 343 
Total available-for-sale$74,258 $9 $6,671 $67,596 
Held-to-Maturity:    
Mortgage-backed Securities:    
Government National Mortgage Association$481 $27 $— $508 
Federal National Mortgage Association and Other4,773 9 14 4,768 
Total held-to-maturity$5,254 $36 $14 $5,276 
Schedule of Unrealized Loss on Investments The following tables set forth the unrealized losses and fair value of securities in an unrealized loss position at December 31, 2022 and March 31, 2022 for less than 12 months and 12 months or longer:
At December 31, 2022
Less than 12 months12 months or longerTotal
$ in thousandsUnrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value
Available-for-Sale:      
Mortgage-backed securities$41 $1,225 $6,838 $26,123 $6,879 $27,348 
U.S. Government Agency securities12 4,107 26 5,715 38 9,822 
Corporate bonds— — 2,324 2,945 2,324 2,945 
Muni securities456 2,222 4,040 11,006 4,496 13,228 
Asset-backed securities— — 1 100 1 100 
Total available-for-sale securities$509 $7,554 $13,229 $45,889 $13,738 $53,443 
Held-to-Maturity:
Mortgage-backed securities$124 $2,246 $— $— $124 $2,246 
  Total held-to-maturity securities$124 $2,246 $— $— $124 $2,246 

At March 31, 2022
Less than 12 months12 months or longerTotal
$ in thousandsUnrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value
Available-for-Sale:      
Mortgage-backed securities$519 $7,057 $2,946 $26,128 $3,465 $33,185 
U.S. Government Agency securities— — 79 13,785 79 13,785 
Corporate bonds— — 1,150 4,121 1,150 4,121 
Muni securities1,640 13,512 333 2,256 1,973 15,768 
Asset-backed securities4 343 — — 4 343 
Total available-for-sale securities$2,163 $20,912 $4,508 $46,290 $6,671 $67,202 
Held-to-Maturity:      
Mortgage-backed securities$14 $2,204 $— $— $14 $2,204 
Total held-to-maturity securities$14 $2,204 $— $— $14 $2,204 
Investments Classified by Contractual Maturity Date The following is a summary of the amortized cost and fair value of debt securities at December 31, 2022, by remaining period to contractual maturity (ignoring earlier call dates, if any).  Actual maturities may differ from contractual maturities because certain security issuers have the right to call or prepay their obligations.  The table below does not consider the effects of possible prepayments or unscheduled repayments.
$ in thousandsAmortized CostFair ValueWeighted
Average Yield
Available-for-Sale:
Less than one year$101 $100 (0.85)%
One through five years— — — %
Five through ten years6,127 5,655 4.08 %
After ten years26,726 20,340 3.10 %
Mortgage-backed securities34,227 27,348 1.59 %
Total$67,181 $53,443 2.26 %
Held-to-maturity:
Mortgage-backed securities$2,406 $2,282 2.74 %