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v3.21.2

Subsequent Events (Details) - Subsequent Event | Nov. 04, 2021 USD ($) | Oct. 29, 2021 USD ($) financial_covenant bank
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Subsequent Event [Line Items] |  |
Share repurchase program, amount authorized | $ 35,000,000 |
Share repurchase program, term | 2 years |
Line of Credit |  |
Subsequent Event [Line Items] |  |
Number of banks | bank |  | 5
Maximum borrowing capacity |  | $ 150,000,000
Additional potential increase |  | $ 65,000,000
Debt instrument, term |  | 3 years
Number of financial covenants | financial_covenant |  | 2
Line of Credit | Minimum |  |
Subsequent Event [Line Items] |  |
Unused commitment fee percentage |  | 0.25%
Line of Credit | Maximum |  |
Subsequent Event [Line Items] |  |
Unused commitment fee percentage |  | 0.35%
Line of Credit | London Interbank Offered Rate (LIBOR) | Minimum |  |
Subsequent Event [Line Items] |  |
Basis spread on variable rate |  | 1.50%
Line of Credit | London Interbank Offered Rate (LIBOR) | Maximum |  |
Subsequent Event [Line Items] |  |
Basis spread on variable rate |  | 2.25%
Letter of Credit |  |
Subsequent Event [Line Items] |  |
Maximum borrowing capacity |  | $ 5,000,000

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- Definition Line of Credit Facility, Accordion Feature + References No definition available. + Details
Name: | mktw_LineOfCreditFacilityAccordionFeature
Namespace Prefix: | mktw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line Of Credit Facility, Number Of Banks + References No definition available. + Details
Name: | mktw_LineOfCreditFacilityNumberOfBanks
Namespace Prefix: | mktw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line Of Credit Facility, Number Of Financial Covenants + References No definition available. + Details
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Namespace Prefix: | mktw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Share Repurchase Program, Term + References No definition available. + Details
Name: | mktw_ShareRepurchaseProgramTerm
Namespace Prefix: | mktw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Period of time between issuance and maturity of debt instrument, 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_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |