Share-based Payments - Performance Stock Units (Details)	6 Months Ended
Sep. 30, 2023 USD ($) d $ / shares shares	Sep. 30, 2022 $ / shares shares
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract]
Risk free interest rate	4.53%
Expected life in years	6 years 6 months 25 days
Expected volatility of MPA common stock	51.29%
Expected dividend yield	0.00%
Grant date fair value (in dollars per share)	$ 3.75
Performance Stock Units [Member]
Performance Stock Units ("PSUs") [Abstract]
Number of trading days \| d	30
Vesting period	3 years
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract]
Risk free interest rate		3.35%
Expected life in years		3 years
Expected volatility of MPA common stock		51.30%
Expected average volatility of peer companies	0.00%	62.70%
Average correlation coefficient of peer companies	0.00%	27.50%
Expected dividend yield	0.00%	0.00%
Grant date fair value (in dollars per share)		$ 16.02
Number of Shares [Roll Forward]
Non-vested at beginning of period (in shares) \| shares	192,696
Granted (in shares) \| shares	585,583	126,028
Vested (in shares) \| shares	0
Forfeited (in shares) \| shares	(1,162)
Non-vested at end of period (in shares) \| shares	777,117
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested at beginning of period (in dollars per share)	$ 17.48
Granted (in dollars per share)	4.5
Vested (in dollars per share)	0
Forfeited (in dollars per share)	5.91
Non-vested at end of period (in dollars per share)	$ 7.72
Total unrecognized compensation expense \| $	$ 3,298,000
Weighted average remaining vesting period over which compensation expense is expected to be recognized	1 year 6 months
Performance Stock Units [Member] \| Minimum [Member]
Performance Stock Units ("PSUs") [Abstract]
Awards vesting target percentage		0.00%
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract]
Risk free interest rate	4.32%
Expected life in years	2 months 12 days
Expected volatility of MPA common stock	54.20%
Grant date fair value (in dollars per share)	$ 3.57
Performance Stock Units [Member] \| Maximum [Member]
Performance Stock Units ("PSUs") [Abstract]
Awards vesting target percentage		150.00%
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract]
Risk free interest rate	4.35%
Expected life in years	1 year 9 months 18 days
Expected volatility of MPA common stock	55.10%
Grant date fair value (in dollars per share)	$ 8.37
Performance Stock Units [Member] \| Tranche One [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)	$ 10
Percentage of vesting of award	33.00%
Performance Stock Units [Member] \| Tranche Two [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)	$ 15
Percentage of vesting of award	33.00%
Performance Stock Units [Member] \| Tranche Three [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)	$ 20
Percentage of vesting of award	33.00%
Performance Stock Units [Member] \| Tranche Three [Member] \| Minimum [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)	$ 17.5
Eligible vesting percentage for recipients	50.00%
Performance Stock Units [Member] \| Tranche Three [Member] \| Maximum [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)	$ 25
Eligible vesting percentage for recipients	150.00%

Each stock price target must be met for consecutive trading days.

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Rate of Average correlation coefficient of peer companies for awards under share-based payment arrangement.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Price of a single share of a number of saleable stocks of a company.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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