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Revenue | 12 Months Ended
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Dec. 31, 2025
Revenue from Contract with Customer [Abstract] |
Revenue | 15) Revenue Disaggregation of Revenue The Company disaggregates revenue from contracts with customers by geographic region, as the Company’s management believes it best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The following tables present revenue disaggregated by geography of the shipping location for the years ended December 31, 2025, 2024 and 2023:
|  | Year Ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
United States |  | $ | 33,386 |  |  | $ | 38,197 |  |  | $ | 53,558 |
Greater China |  |  | 102,872 |  |  |  | 98,307 |  |  |  | 101,323 |
Europe |  |  | 42,855 |  |  |  | 37,337 |  |  |  | 36,042 |
South Korea |  |  | 15,049 |  |  |  | 15,211 |  |  |  | 18,768 |
Rest of North America |  |  | 3,229 |  |  |  | 4,438 |  |  |  | 8,475 |
Rest of Asia Pacific |  |  | 18,498 |  |  |  | 21,245 |  |  |  | 2,949 |
South America |  |  | 1,505 |  |  |  | 1,947 |  |  |  | 2,054 |
Total |  | $ | 217,394 |  |  | $ | 216,682 |  |  | $ | 223,169 |
Contract Balances Certain assets or liabilities are recorded depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis. Contract liabilities primarily relate to deferred revenue, including advance consideration received from customers for contracts prior to the transfer of control to the customer, and therefore revenue is recognized upon delivery of products and services or as the services are performed. The following table presents the assets and liabilities associated with the engineering services contracts recorded on the consolidated balance sheet as of December 31, 2025 and 2024:
|  |  |  | December 31, |
|  | Balance Sheet Classification |  | 2025 |  |  | 2024 |
Unbilled revenue |  | Prepaid expenses and other current assets |  | $ | 4,814 |  |  | $ | 9,154 |
Contract liabilities |  | Accrued expenses and other current liabilities |  | $ | 4,601 |  |  | $ | 2,735 |
During the year ended December 31, 2025, 2024 and 2023, the Company recognized $2,001, $1,708, and $1,734, respectively, of revenue related to amounts that were previously included in deferred revenue at the beginning of the period. Deferred revenue fluctuates over time due to changes in the timing of payments received from customers and revenue recognized for services provided. Revenue related to remaining performance obligations represents the amount of contracted development arrangements that has not been recognized, which includes deferred revenue on the consolidated balance sheet and unbilled amounts that will be recognized as revenue in future periods. As of December 31, 2025, the amount of performance obligations that have not been recognized as revenue was $2,139, of which approximately 100% is expected to be recognized as revenue over the next 12 months. This amount excludes the value of remaining performance obligations for contracts with an original expected length of one year or less. Variable consideration that has been constrained is excluded from the amount of performance obligations that have not been recognized. Concentrations As identified below, one of our customers accounted for more than 10% of the Company’s total revenue for the year ended December 31, 2023. No individual customer accounted for more than 10% of the Company’s total revenue for the years ended December 31, 2025 and 2024:
|  | December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Customer A |  |  | 6.0 | % |  |  | 9.3 | % |  |  | 14.8 | %
The loss of this customer would have a material impact on the Company’s consolidated financial results. Two large customers represented 11% and 10% of accounts receivable as of December 31, 2025, respectively. One large customer represented 11% of accounts receivable as of December 31, 2024. No other individual customer represented more than 10% of accounts receivable at December 31, 2025 and 2024, respectively.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org/606/tableOfContent + Details
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