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Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Jul. 13, 2017
Interest Rate Swap Contracts [Member] | Other Current Liabilities [Member]      
Derivative [Line Items]      
Liability of fair value of the interest rate swap contracts $ 56,000    
Interest Rate Swap Contracts [Member] | Other Current Assets [Member]      
Derivative [Line Items]      
Asset of fair value of the interest rate swap contracts   $ 106,000  
Interest Rate Risk Management [Member]      
Derivative [Line Items]      
Notional amount 10,900,000 12,600,000  
Interest Rate Risk Management [Member] | Interest Rate Swap Contracts [Member]      
Derivative [Line Items]      
Notional amount     $ 15,000,000
Fixed rate of interest in swap contracts     1.99%
Interest Rate Risk Management [Member] | Interest Rate Swap Contracts [Member] | Other Current Liabilities [Member]      
Derivative [Line Items]      
Liability of fair value of the interest rate swap contracts 56,000    
Interest Rate Risk Management [Member] | Interest Rate Swap Contracts [Member] | Other Current Assets [Member]      
Derivative [Line Items]      
Asset of fair value of the interest rate swap contracts   $ 106,000  
Designated as Hedging Instrument [Member] | Currency Hedge and Interest Rate Swap [Member]      
Derivative [Line Items]      
Estimated amount of pretax losses from other comprehensive income (loss) during the next 12-months $ 30,000