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Product Warranty (Tables)
3 Months Ended
Mar. 31, 2021
Product Warranty  
Schedule of product warranty liability

Three months ended

March 31,

    

2021

    

2020

    

(in thousands)

Balance at January 1 (beginning of year)

$

4,612

$

3,244

Warranties issued during the period

 

1,288

 

1,385

Settlements made during the period

 

(968)

 

(950)

Changes in estimate of liability for pre-existing warranties during the period

 

(192)

 

126

Balance at March 31 (end of period)

$

4,740

$

3,805

Amount classified as current

$

4,181

$

3,431

Amount classified as long-term

 

559

 

374

Total warranty liability

$

4,740

$

3,805