Share-based Payments, Performance Stock Units (Details) - Performance Stock Units [Member]	3 Months Ended
Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 d $ / shares shares
Performance Stock Units ("PSUs") [Abstract]
Number of trading days \| d		30
Vesting period	3 years	3 years
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract]
Risk free interest rate	4.45%	4.32%
Expected life in years	3 years
Expected volatility of MPA common stock	59.80%	54.20%
Average correlation coefficient of peer companies	16.50%	0.00%
Expected dividend yield	0.00%	0.00%
Grant date fair value (in dollars per share)	$ 8.65
Number of Shares [Roll Forward]
Non-vested at beginning of period (in shares) \| shares	773,923
Granted (in shares) \| shares	155,391	533,856
Added by performance factor (in shares) \| shares	10,952
Vested (in shares) \| shares	(32,848)
Forfeited/Cancelled (in shares) \| shares	(52,137)
Non-vested at end of period (in shares) \| shares	855,281
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested at beginning of period (in dollars per share)	$ 7.73
Granted (in dollars per share)	8.65
Added by performance factor (in dollars per share)	22.27
Vested (in dollars per share)	22.27
Forfeited/Cancelled (in dollars per share)	23.27
Non-vested at end of period (in dollars per share)	$ 6.58
Total unrecognized compensation expense \| $	$ 2,280,000
Weighted average remaining vesting period over which compensation expense is expected to be recognized	2 years 1 month 6 days
Market capitalization \| $	$ 600,000,000
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]
Expected life in years		9 months 18 days
Grant date fair value (in dollars per share)		$ 3.57
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]
Expected life in years		1 year 9 months 18 days
Grant date fair value (in dollars per share)		$ 5.06
Tranche One [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)		$ 10
Percentage of vesting of award		33.00%
Tranche Two [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)		$ 15
Percentage of vesting of award		33.00%
Tranche Three [Member]
Performance Stock Units ("PSUs") [Abstract]
Stock price (in dollars per share)		$ 20
Percentage of vesting of award		33.00%
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%
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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Target percentage of vesting of award under share-based payment arrangement.

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The weighted average fair value at grant date for nonvested equity-based awards issued for a performance factor 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 shares added during the period from a performance factor 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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Percentage of vesting of award under share-based payment arrangement, eligible for recipients.

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

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The minimum market capitalization of companies used as a comparative measure for determining the entity's total shareholder return.

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Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
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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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
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-Section 50
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Percentage of vesting of award under share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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