v3.10.0.1

Fair value measurement (Details) - Recurring basis - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets:
Money market accounts	$ 137,723	$ 2,255
Total assets	137,723	2,255
Liabilities:
Contingent consideration	961
Total liabilities	961
Level 1
Assets:
Money market accounts	137,723	2,255
Total assets	137,723	2,255
Liabilities:
Contingent consideration	0
Total liabilities	0
Level 2
Assets:
Money market accounts	0	0
Total assets	0	0
Liabilities:
Contingent consideration	0
Total liabilities	0
Level 3
Assets:
Money market accounts	0	0
Total assets	0	$ 0
Liabilities:
Contingent consideration	961
Total liabilities	$ 961

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
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- Definition

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

Fair value of financial and nonfinancial obligations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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