Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information Credit Agreement (Detail)

v3.20.4
Commitments and Contingencies - Additional Information Credit Agreement (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Line of Credit Facility [Line Items]      
Senior secured revolving credit facility maximum borrowing capacity $ 60,000,000.0    
Revolving credit facility maturity date Jun. 01, 2022    
Date the company entered into a credit Agreement Jun. 18, 2014    
Credit agreement amended and restated date May 28, 2019    
Credit agreement date Nov. 27, 2019    
Standby letters of credit borrowing capacity $ 10,000,000.0    
Standby letters of credit, utilized amount $ 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 December 31, 2020. Borrowings under the Credit Facility will bear interest, at the Company’s option, at either (i) a fluctuating rate per annum 2.00% below the Base Rate (defined as the highest of (a) the Bank’s prime rate, (b) one-month LIBOR plus 1.50%, and (c) the federal funds rate plus 1.50%), or (ii) at a fixed rate per annum determined by Bank to be between 0.875% to 1.125% above LIBOR.    
LIBOR rate duration period 1 month    
Credit agreement, unused capacity, commitment fee percentage 0.10%    
Interest expense $ 900,000 $ 1,388,000 $ 1,400,000
Credit agreement, amount outstanding $ 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 1.5:1.0 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 1.5:1    
Credit agreement, pledge percentage 100.00%    
Compliance description As of December 31, 2020, 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.    
Fluctuating rate per annum 2.00%    
LIBOR [Member]      
Line of Credit Facility [Line Items]      
Base spread on variable rate 1.50%    
Federal Funds Rate [Member]      
Line of Credit Facility [Line Items]      
Base spread on variable rate 1.50%    
Credit Agreement [Member]      
Line of Credit Facility [Line Items]      
Credit agreement date Feb. 09, 2021    
Interest expense $ 93,000 $ 94,000 $ 104,000
Credit agreement, amount outstanding $ 0    
Minimum [Member] | LIBOR [Member]      
Line of Credit Facility [Line Items]      
Base spread on variable rate 0.875%    
Maximum [Member] | LIBOR [Member]      
Line of Credit Facility [Line Items]      
Base spread on variable rate 1.125%