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Debt Arrangements - Additional Information (Detail) - USD ($)							6 Months Ended
		Jan. 19, 2021	Apr. 17, 2020	Aug. 14, 2019	Apr. 25, 2019	Aug. 22, 2016	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Sep. 30, 2020
Debt Instrument [Line Items]
Line of credit utilized borrowing capacity							$ 16,800,000
Debt to earnings before Interest, Taxes and Depreciation ratio			225.00%
Line of credit remaining borrowing capacity							45,200,000
Letters of credit outstanding amount							100,000
Proceeds from long-term debt	[1]						42,954,000	$ 41,163,000
U.S. [Member]
Debt Instrument [Line Items]
Borrowings							$ 5,900,000
Expiration date							Jun. 30, 2024
Interest rate for Line of credit							1.236%
Asia Pacific [Member]
Debt Instrument [Line Items]
Restricted cash used to secure bank debt							$ 300,000		$ 600,000
LIBOR [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus			1.125%
LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus			1.50%
Austrian Subsidiary [Member]
Debt Instrument [Line Items]
Interest rate							1.216%
Increased borrowing capacity			$ 65,000,000
Extended debt instrument date			Jun. 30, 2024			Jun. 30, 2021
Borrowings							$ 600,000
Expiration date							Jun. 30, 2024
Polish Subsidiary [Member]
Debt Instrument [Line Items]
Borrowings							$ 6,600,000
Interest rate for Line of credit							1.305%
Polish Subsidiary [Member] | Warsaw Interbank Offer Rate [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus							1.125%
Expiration date							Jun. 30, 2024
Australian Subsidiary [Member]
Debt Instrument [Line Items]
Borrowings							$ 3,700,000
Interest rate for Line of credit							1.15%
Expiration date							Jun. 30, 2024
Indonesian Subsidiary [Member]
Debt Instrument [Line Items]
Interest rate					3.501%
Line of credit utilized borrowing capacity							$ 6,300,000
Outstanding letters of credit, current							$ 800,000
Expiration date					Apr. 30, 2024
Proceeds from long-term debt					$ 8,000,000.0
New Zealand Subsidiary {Member}
Debt Instrument [Line Items]
Interest rate				3.90%			3.15%
Outstanding letters of credit, current							$ 3,800,000
Expiration date				Aug. 26, 2021
Proceeds from long-term debt				$ 5,300,000
Corporate Aircraft [Member]
Debt Instrument [Line Items]
Debt instrument, face amount										$ 6,800,000
Corporate Aircraft [Member] | Term Loan [Member] | PNC Equipment Finance, LLC [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 20,500,000
Debt instrument, payment terms		120 months
Interest rate		2.744%
Debt instrument, frequency of periodic payment		The loan is payable in 119 equal monthly installments
Debt instrument, date of first required payment		Mar. 01, 2021
Debt instrument, description							The loan is payable in 119 equal monthly installments, which commenced on March 1, 2021 with a final payment of any outstanding principal and accrued interest due and payable on the final monthly payment date.
Line of credit utilized borrowing capacity							$ 19,800,000
Outstanding letters of credit, current							$ 2,100,000
[1] Non-cash investing and financing activities:  The Company purchased a new corporate aircraft during six-month period ended June 30, 2021 with a term loan in the principal amount of $20.5 million.  For further information regarding this transaction, refer to Note P, “Debt Arrangements.

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