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Share-based Payments - Performance Stock Units (Details) - Performance Stock Units [Member] | 12 Months Ended
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Mar. 31, 2024 USD ($) d $ / shares shares | Mar. 31, 2023 $ / shares shares | Mar. 31, 2022 $ / shares shares
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% | 0.47%
Expected life in years |  | 3 years | 3 years
Expected volatility of MPA common stock |  | 51.30% | 53.70%
Expected average volatility of peer companies | 0.00% | 62.70% | 59.30%
Average correlation coefficient of peer companies | 0.00% | 27.50% | 26.70%
Expected dividend yield | 0.00% | 0.00% | 0.00%
Grant date fair value (in dollars per share) |  | $ 16.02 | $ 26.89
Number of Shares [Roll Forward] |  |  |
Outstanding at beginning of period (in shares) | shares | 192,696 |  |
Granted (in shares) | shares | 585,583 | 126,028 | 84,593
Vested (in shares) | shares | 0 |  |
Forfeited/Cancelled (in shares) | shares | (4,356) |  |
Outstanding at end of period (in shares) | shares | 773,923 | 192,696 |
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Outstanding at beginning of period (in dollars per share) | $ 17.48 |  |
Granted (in dollars per share) | 4.5 |  |
Vested (in dollars per share) | 0 |  |
Forfeited/Cancelled (in dollars per share) | 5.79 |  |
Outstanding at end of period (in dollars per share) | $ 7.73 | $ 17.48 |
Total unrecognized compensation expense | $ | $ 1,361,000 |  |
Weighted average remaining vesting period over which compensation expense is expected to be recognized | 1 year |  |
Minimum [Member] |  |  |
Performance Stock Units ("PSUs") [Abstract] |  |  |
Awards vesting target percentage |  | 0.00% | 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 |  |
Maximum [Member] |  |  |
Performance Stock Units ("PSUs") [Abstract] |  |  |
Awards vesting target percentage |  | 150.00% | 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 |  |
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% |  |

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- Definition 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. + References 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 -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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