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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies

Schedule of changes in product warranty reserves

​

​	​	​	​	​	​	​	​	​	​
​	​	December 31,
​		2023			2022			2021
​	​	​	(in thousands)
Balance - beginning of the year	​	$	8,601	​	$	7,878	​	$	5,058
Warranties issued	​		6,479	​		8,304	​		7,102
Addition from Epiluvac acquisition	​	​	49	​	​	—	​	​	—
Consumption of reserves	​		(7,029)	​		(7,527)	​		(5,784)
Changes in estimate	​		764	​		(54)	​		1,502
Balance - end of the year	​	$	8,864	​	$	8,601	​	$	7,878

Schedule of maturities of lease liabilities 2020

​

​	​	​	​
​	​	Operating
​		Leases
​	​	(in thousands)
Payments due by period:	​	​	​
2024	​	$	3,692
2025	​	​	4,130
2026	​	​	4,087
2027	​	​	3,639
2028	​	​	3,422
Thereafter	​	​	30,824
Total future minimum lease payments	​	​	49,794
Less: Imputed interest	​	​	(14,240)
Total	​	$	35,554
​	​	​	​
Reported as of December 31, 2023	​	​	​
Accrued expenses and other current liabilities	​	$	4,025
Long-term operating lease liabilities	​	​	31,529
Total	​	$	35,554

Schedule of customers who accounted for more than 10% of our aggregate accounts receivable or net sales

​

​	​	​	​	​	​	​	​	​	​	​	​
​	​	Accounts Receivable			​	Net Sales
​	​	December 31,			​	For the Year Ended December 31,
Customer		2023		2022		2023		2022		2021
Customer A	​	*	​	*	​	10	%	*	​	*	​
Customer B	​	10	%	*	​	*	​	*	​	10	%
Customer C	​	11	%	*	​	*	​	*	​	*	​
Customer D	​	*	​	10	%	*	​	*	​	*	​
Customer E		*	​	*	​	*	​	*	​	15	%

* Less than 10% of aggregate accounts receivable or net sales

​

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- References

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- Definition

Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-6

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- Definition

Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-8

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- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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