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Debt - Equity Component (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	May 31, 2020
Debt Disclosure [Abstract]
Proceeds allocated to the conversion option (debt discount)	$ 205,290	$ 205,290
Less: allocated issuance costs	(4,478)	(4,478)
Carrying amount of the equity component, net	$ 200,812	$ 200,812	$ 205,300

X

- Definition

Debt Instrument, Convertible, Carrying Amount of Equity Component, Gross

+ References

No definition available.

+ Details

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Namespace Prefix:	cloud_
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Balance Type:	credit
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X

- Definition

Debt Instrument, Convertible, Equity Component Issuance Costs

+ References

No definition available.

+ Details

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Namespace Prefix:	cloud_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

X

- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

+ Details

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