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Product Warranty
 6 Months Ended
Jun. 30, 2026
Product Warranty  
Product Warranty

Note 10.  Product Warranty

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We generally offer a one-year warranty for all of our systems, the terms and conditions of which vary depending upon the product sold. For all systems sold, we accrue a liability for the estimated cost of standard warranty at the time of system shipment and, if applicable, defer the portion of systems revenue attributable to non-standard warranty. Costs for

non-standard warranty are expensed as incurred. Factors that affect our warranty liability include the number of installed units, historical and anticipated product failure rates, material usage and service labor costs. We periodically assess the adequacy of our recorded liability and adjust the amount as necessary.

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The changes in our standard product warranty liability are as follows:

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Six months ended

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June 30,

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  ​ ​ ​

2026

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2025

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(in thousands)

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Balance at January 1 (beginning of year)

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$

11,587

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$

15,183

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Warranties issued during the period

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5,298

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4,334

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Settlements made during the period

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(3,601)

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(6,865)

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

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(1,969)

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(61)

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Balance at June 30 (end of period)

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$

11,315

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$

12,591

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​

​

​

​

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​

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Amount classified as current

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$

9,634

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$

10,903

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Amount classified as long-term (within other long-term liabilities)

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1,681

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1,688

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Total warranty liability

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$

11,315

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$

12,591

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