Revenue and Deferred Revenue - Additional Information (Details) $ in Millions	3 Months Ended	6 Months Ended
Jul. 31, 2019 USD ($) Country Customer	Jul. 31, 2018 Country Customer	Jul. 31, 2019 USD ($) Source Country Customer	Jul. 31, 2018 Country Customer
Disaggregation Of Revenue [Line Items]
Number of sources of revenue \| Source			2
Number of countries outside United States represented 10% or more of total revenue \| Country	0	0	0	0
Number of customers that individually exceeded 10% of revenue \| Customer	0	0	0	0
Deferred revenue recognized \| $	$ 3.4		$ 11.8
Ooma Residential \| Revenue
Disaggregation Of Revenue [Line Items]
Concentration risk, percentage	59.00%	69.00%	62.00%	70.00%
Ooma Business \| Revenue
Disaggregation Of Revenue [Line Items]
Concentration risk, percentage	38.00%	27.00%	36.00%	26.00%

Number of countries outside that exceeded ten percentage of revenue.

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Number of customers that individually exceeded 10% of revenue.

+ References

No definition available.

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Number of sources of revenue.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 825
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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