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Financial Instruments and Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2020	Feb. 18, 2020
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Borrowings outstanding	$ 153,500				$ 136,000
Interest expense	1,766		$ 1,030
Payment of earn-out consideration paid within operating activities	72		(633)
Transfers in or out of Level 3	0
Cash Flow Hedging [Member] \| U.S. Dollar Denominated Foreign Currency Forward Contracts Euro Functional Currency [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	2,100				0
Cash Flow Hedging [Member] \| Mexican Peso-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	11,838				1,242
Cash Flow Hedging [Member] \| Interest Rate Swap [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts						$ 50,000
Interest expense	158		4
Cash Flow Hedging [Member] \| Interest Rate Swap [Member] \| Credit Facility [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Borrowings outstanding	153,500
Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member] \| Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	11,838				1,242
Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member] \| Interest Rate Swap [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	50,000				$ 50,000
Electronics [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest expense	131		87
Control Devices [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest expense	132		$ 81
Control Devices [Member] \| Particulate Matter Fixed Assets [Member] \| Tallinn, Estonia Facility [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Asset impairments	$ 2,326
Control Devices [Member] \| Selling, General and Administrative Expenses [Member] \| Particulate Matter Fixed Assets [Member] \| Tallinn, Estonia Facility [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Asset impairments		$ 2,326		$ 2,326