Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Jul. 13, 2017
Interest Rate Swap Contracts [Member]
Derivative [Line Items]
Liability of fair value of the interest rate swap contracts	$ 73,000	$ 43,000
Interest Rate Swap Contracts [Member] | Other Current Liabilities [Member]
Derivative [Line Items]
Liability of fair value of the interest rate swap contracts	73,000	43,000
Interest Rate Risk Management [Member]
Derivative [Line Items]
Notional amount	8,600,000	10,300,000
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	72,000	$ 43,000
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	$ 36,000