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Segment Reporting | 9 Months Ended
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Sep. 30, 2023
Segment Reporting [Abstract] |
Segment Reporting | 15. Segment Reporting Operating segments are components of an enterprise that engage in business activities for which discrete financial information is available and regularly reviewed by the chief operating decision maker ("CODM") in deciding how to allocate resources and assess performance. Our Chief Executive Officer ("CEO") has been identified as the CODM. The Company views its operations, makes decisions regarding how to allocate resources and manages its business as one operating segment and one reportable segment. Our CODM evaluates financial information on a consolidated basis. As a result, the required financial segment information can be found in the consolidated condensed financial statements of the Company disclosed herein. The following table represents the Company’s total revenue by geographic area (based on the location of the customer):
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Revenue by customers' geographic locations: |  |  |  |  |  |  |  | (As Restated) |  |  |  |
North America |  |  | 49 | % |  |  | 42 | % |  |  | 46 | % |  |  | 42 | %
Europe |  |  | 34 | % |  |  | 35 | % |  |  | 34 | % |  |  | 38 | %
APAC/Other |  |  | 17 | % |  |  | 23 | % |  |  | 20 | % |  |  | 20 | %
Total revenue |  |  | 100 | % |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
Concentrations of Credit Risk and Significant Customers (As Restated) Financial instruments that subject the Company to significant concentrations of credit risk primarily consist of cash and cash equivalents, marketable securities and accounts receivable. Per the Company’s investment policy, cash equivalents and marketable securities are invested in financial instruments with high credit ratings and credit exposure to any one issue, issuer (with the exception of U.S. Treasury obligations) and type of instrument is limited. At September 30, 2023 and December 31, 2022, the Company had no investments associated with foreign exchange contracts, options contracts or other foreign hedging arrangements. Concentration of credit risk with respect to accounts receivable is limited to customers to whom the Company makes significant sales. While a reserve for the potential write-off of accounts receivable is maintained, the Company has not written off any significant accounts to date. To control credit risk, the Company performs regular credit evaluations of its customers’ financial condition. There was no revenue from customers that represented 10% or more of the Company's total revenue for the three and nine months ended September 30, 2023 and 2022. No accounts receivable balance from a specific customer represented 10% or more of the Company's total trade accounts receivable at September 30, 2023. Significant accounts receivable balances representing 10% or more of the Company's accounts receivable and royalties at December 31, 2022 came from our accounts receivable balance outstanding with Purolite, an Ecolab Inc. company, which was 12.7% of our total trade accounts receivable balance.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards 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