LEASES - Summary of Company's Lease Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 29, 2020	Jul. 01, 2019
Lease Assets
Operating lease assets	$ 779	$ 3,931
Lease Liabilities
Current operating lease liabilities	$ 334
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	mcft:AccruedExpensesAndOtherLiabilitiesCurrent
Non-current operating lease liabilities	$ 445	$ 3,384
Total lease liabilities	$ 779