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Long-term Debt - Additional Information (Detail)	1 Months Ended			12 Months Ended
	Nov. 30, 2017 USD ($)	Sep. 30, 2015	Sep. 30, 2006 USD ($)	Jun. 25, 2020 USD ($)	Jun. 27, 2019 USD ($)	Jun. 28, 2018 USD ($)	Feb. 07, 2008 USD ($)
Promissory Note [Member] | Executive Officer [Member]
Debt Disclosure [Line Items]
Interest paid on promissory note				$ 127,000	$ 413,000	$ 338,000
Mortgage Facility Tranche A [Member]
Debt Disclosure [Line Items]
Amounts of term loans							$ 36,000,000
Debt obligation outstanding				7,144,000	9,542,000
Mortgage Facility Tranche B [Member]
Debt Disclosure [Line Items]
Amounts of term loans							9,000,000
Debt obligation outstanding				$ 1,786,000	2,386,000
Selma, Texas Properties [Member]
Debt Disclosure [Line Items]
Selling price of Texas properties sold to related party partnerships			$ 14,300,000
Renewal options of Texas properties		In September 2015, we signed a lease renewal which exercised two five-year renewal options and extended the term of our Selma lease to September 18, 2026.	The lease for the Selma, Texas properties had an initial ten-year term at a fair market value rent with three five-year renewal options.
Lease term of Texas properties			10 years
Option percentage of fair value to purchase the properties				95.00%
Option percentage of fair value to purchase the properties in certain circumstances				100.00%
Debt obligation outstanding				$ 9,532,000	$ 10,120,000
Minimum amount accepted for repurchase				14,300,000
Unsecured Promissory Note [Member]
Debt Disclosure [Line Items]
Date of acquisition	Nov. 30, 2017
Business combination consideration transferred acquisition financing	$ 11,500,000
Purchase price financed by seller through unsecured promissory note,term	3 years
Unsecured promissory note, periodic payment, principal	5.5
Unsecured promissory note, periodic payment, principal	$ 319,000
Percentage of increase in interest	7.5
Outstanding balance of promissory note				1,597,000
Mortgage Facility [Member]
Debt Disclosure [Line Items]
Amounts of term loans							$ 45,000,000
Mortgage Facility contain covenants to maintain specified net worth				110,000,000
Carrying amount of assets pledged as collateral				$ 67,043,000

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