Significant Accounting Policies - Narrative (Details) $ in Thousands, R$ in Millions			3 Months Ended	12 Months Ended
	Feb. 28, 2022 USD ($)	Feb. 28, 2022 BRL (R$)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items]
Cash, cash equivalents and restricted cash				$ 134,400	$ 158,600
Restricted cash				300
Allowance for credit loss				700
Assets held for sale				5,100	6,300
Revenue from contract with customer, total orders				29,300
Advertising expense				1,500	2,600	$ 3,700
Foreign currency transaction gain (loss), before tax				(1,300)	(1,100)	(600)
Operating lease right-of-use asset				$ 5,800	6,600
Subsequent Event
Significant Accounting Policies [Line Items]
Gain on sale of previously unissued stock by subsidiary or equity investee, nonoperating income	$ 2,000	R$ 10.0
Subsidiary
Significant Accounting Policies [Line Items]
Noncontrolling interest, ownership percentage by parent				7.00%
Line of Credit
Significant Accounting Policies [Line Items]
Unsecured line of credit - maximum				$ 150,000	150,000
Software and Software Development Costs
Significant Accounting Policies [Line Items]
Production costs, period cost			$ 1,500
Government Money Market Funds
Significant Accounting Policies [Line Items]
Cash, cash equivalents and restricted cash				117,000	137,000
Other Current Assets
Significant Accounting Policies [Line Items]
Derivative asset				100
Other Current Liabilities
Significant Accounting Policies [Line Items]
Derivative financial instruments				0	500
Foreign Exchange Contract
Significant Accounting Policies [Line Items]
Average notional amount				7,800
Foreign Exchange Contract | Not Designated as Hedging Instrument | Cost of Sales
Significant Accounting Policies [Line Items]
Gain/(loss) of derivative financial instruments recognized in income, net				$ 800	200	$ (100)
Accumulated Other Comprehensive Loss | Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects related to TCJA					700
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects related to TCJA					$ (700)
Minimum
Significant Accounting Policies [Line Items]
Standard product warranty description				three months
Maximum
Significant Accounting Policies [Line Items]
Standard product warranty description				two years
General Liability
Significant Accounting Policies [Line Items]
Amount captive is liable per occurrence of claims				$ 1,000
Workers' Compensation Insurance
Significant Accounting Policies [Line Items]
Amount captive is liable per occurrence of claims				$ 350
Astec do Brasil Fabricacao de Equipamentos LTDA
Significant Accounting Policies [Line Items]
Consolidation less than wholly owned subsidiary parent ownership percentage				93.00%