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Cash, cash equivalents and marketable securities - Portfolio of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Cash and cash equivalents
Cost or Amortized cost	$ 33,579	$ 34,601
Fair value	33,579	34,601
Cash accounts in banking institutions
Cash and cash equivalents
Cost or Amortized cost	5,234	7,532
Fair value	5,234	7,532
Money market funds
Cash and cash equivalents
Cost or Amortized cost	27,347	24,578
Fair value	27,347	24,578
Commercial paper
Cash and cash equivalents
Cost or Amortized cost	998	2,491
Fair value	$ 998	$ 2,491

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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