Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information Credit Agreement (Detail)

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Commitments and Contingencies - Additional Information Credit Agreement (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Line of Credit Facility [Line Items]        
Senior secured revolving credit facility maximum borrowing capacity $ 60,000,000   $ 60,000,000  
Date the company entered into a credit Agreement     Jun. 18, 2014  
Credit agreement amended and restated date     May 31, 2022  
Standby letters of credit borrowing capacity 10,000,000   $ 10,000,000  
Standby letters of credit, utilized amount 533,000   $ 533,000  
Credit facility interest rate description     The Credit Facility includes a $10.0 million sublimit for the issuance of standby letters of credit of which $533,000 was utilized at June 30, 2022. Borrowings under the Credit Facility will bear interest at the Daily Simple SOFR rate plus a spread of between 1.00% to 1.25% depending on the Company’s total funded debt to EBITDA as defined in the Credit Agreement.  
Credit agreement, unused capacity, commitment fee percentage     0.10%  
Interest expense 158,000 $ 146,000 $ 318,000 $ 292,000
Credit agreement, amount outstanding 0   $ 0  
Credit facility covenants     (i) an EBITDAR Coverage Ratio (as defined in the Credit Agreement) of not less than 1.25:1.0 as of each quarter end, determined on a rolling four-quarter basis, and (ii) total funded debt to EBITDA not greater than 2.0:1.0 as of each quarter end, determined on a rolling four-quarter basis, and also limits investments in foreign entities and certain other loans.  
Minimum EBITDAR coverage ratio     1.25%  
Maximum Total Funded Debt to EBITDA ratio     2.0  
Credit agreement, pledge percentage     100.00%  
Compliance description     As of June 30, 2022, the Company was in compliance with all financial and non-financial covenants and has not experienced any limitation in its operations as a result of the covenants.  
Credit Agreement [Member]        
Line of Credit Facility [Line Items]        
Interest expense 22,000 $ 20,000 $ 47,000 $ 44,000
Credit agreement, amount outstanding $ 0   $ 0  
Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility Bearing interest rate     1.00%  
Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility Bearing interest rate     1.25%