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Long-term Debt - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Apr. 29, 2020
Sep. 30, 2015
Sep. 30, 2006
Jun. 30, 2022
Jun. 24, 2021
Feb. 07, 2008
Mortgage Facility Tranche A [Member]            
Debt Disclosure [Line Items]            
Amounts of term loans           $ 36,000,000
Debt obligation outstanding       $ 2,031,000 $ 4,642,000  
Mortgage Facility Tranche B [Member]            
Debt Disclosure [Line Items]            
Amounts of term loans           9,000,000
Debt obligation outstanding       $ 508,000 1,160,000  
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   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. 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.      
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       $ 8,388,000 $ 8,947,000  
Minimum amount accepted for repurchase       14,300,000    
Former monthly lease amount       103,000    
Current monthly lease amount       114,000    
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       $ 59,375,000