XML 138 R121.htm IDEA: XBRL DOCUMENT
v3.21.2

Business Combination Agreement and Financing - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2021 USD ($)
Line of Credit Facility [Line Items] |
Line of Credit Facility, Maximum Borrowing Capacity | $ 90
Goldman Sachs Lending Partners LLC and Citigroup Global Markets Inc [Member] | Senior Secured Term loan B Facility [Member] |
Line of Credit Facility [Line Items] |
Line of Credit Facility, Maximum Borrowing Capacity | $ 830
Line of Credit Facility, Expiration Period | 7 years
Line of credit amortization rate | 1
Goldman Sachs Lending Partners LLC and Citigroup Global Markets Inc [Member] | Revolving Credit Facility [Member] |
Line of Credit Facility [Line Items] |
Line of Credit Facility, Expiration Period | 5 years

X
- Definition Line of credit amortization rate. + References No definition available. + Details
Name: | mir_LineOfCreditAmortizationRate
Namespace Prefix: | mir_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=mir_GoldmanSachsLendingPartnersLlcAndCitigroupGlobalMarketsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=mir_SeniorSecuredTermLoanBFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |