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Balance Sheet Components - Components of Other Long-Term Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Other Assets Noncurrent [Abstract]
Deferred sales commissions, non-current	$ 4,292	$ 3,387
Convertible note receivable, including interest income	1,348	1,300
Other non-current assets	841	692
Total other assets	$ 6,481	$ 5,379

X

- Definition

Convertible notes receivable including interest income.

+ References

No definition available.

+ Details

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

X

- Definition

Deferred sales commissions non current.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount of noncurrent assets classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- References

No definition available.

+ Details

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