Represents the yearly rental rate per rentable square foot under an operating lease.

No definition available.

Name:	mdc_OperatingLeasesYearlyRentalRatePerRentableSquareFoot
Namespace Prefix:	mdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

Note 20 - Related Party Transactions (Details Textual)					3 Months Ended
Note 20 - Related Party Transactions (Details Textual)	Oct. 31, 2026 USD ($)	Nov. 01, 2021 USD ($)	Oct. 31, 2021 USD ($)	Nov. 01, 2016 USD ($) ft²	Mar. 31, 2019 USD ($)
Cash Contribution Committed to Charitable Foundation					$ 500,000
Sublease Agreement [Member] \| CVentures, Inc. [Member]
Area of Real Estate Property \| ft²				5,437
Operating Leases, Yearly Rental Rate Per Rentable Square Foot				$ 26.50
Sublease Agreement [Member] \| CVentures, Inc. [Member] \| Forecast [Member]
Operating Leases, Yearly Rental Rate Per Rentable Square Foot	$ 31.67	$ 29.26	$ 28.68