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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Changes in the Liability for Product Warranty Claim Costs
Changes in the liability for product warranty claim costs were as follows: 
Year Ended December 31,
(In thousands)202020192018
Balance at beginning of period$1,514 $276 $339 
Accruals for warranties issued during the period578 1,742 787 
Settlements (in cash or in kind) during the period(463)(504)(849)
Foreign currency translation gain (loss)92 — (1)
Balance at end of period$1,721 $1,514 $276