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Long-term Debt - Additional Information (Detail) - USD ($)		1 Months Ended		12 Months Ended
	Feb. 28, 2018	Nov. 30, 2017	Sep. 30, 2006	Jun. 28, 2018	Jun. 29, 2017	Feb. 07, 2008
Debt Disclosure [Line Items]
Date of acquisition		Nov. 30, 2017
Purchase price financed by seller through unsecured promissory note,term		3 years
Percentage of increase in interest		7.50%
Outstanding balance of promissory note				$ 9,264,000
Promissory Note [Member]
Debt Disclosure [Line Items]
Interest paid on promissory note				$ 338,000
Mortgage Facility Tranche A [Member]
Debt Disclosure [Line Items]
Amounts of term loans						$ 36,000,000
Interest rate	7.63%
Mortgage Facility Tranche B [Member]
Debt Disclosure [Line Items]
Amounts of term loans						9,000,000
Debt interest fixed rate	4.25%			4.25%
Mortgage faiclity interest	One-month LIBOR plus 3.50% per annum or (ii) 4.25%
Interest rate added to LIBOR	3.50%
Debt obligation outstanding				$ 2,960,000	$ 3,550,000
Mortgage Facility [Member]
Debt Disclosure [Line Items]
Amounts of term loans						$ 45,000,000
Debt interest fixed rate	4.25%
Mortgage Facility contain covenants to maintain specified net worth				110,000,000
Carrying amount of assets pledged as collateral				$ 71,427,000
Selma, Texas Properties [Member]
Debt Disclosure [Line Items]
Capital lease recorded as debt obligation			$ 14,300,000
Selling price of Texas properties sold to related party partnerships			$ 14,300,000
Renewal options of Texas properties			Three five-year term
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				$ 10,584,000	$ 11,058,000
Minimum amount accepted for repurchase				$ 14,300,000
Unsecured Promissory Note [Member]
Debt Disclosure [Line Items]
Purchase price financed by seller through unsecured promissory note		$ 11,500,000
Purchase price financed by seller through unsecured promissory note,term		3 years
Unsecured promissory note, periodic payment, principal		5.50%
Unsecured promissory note, periodic payment, principal		$ 319,000
Unsecured promissory note, periodic payment,commencement date		2018-01

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