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Commitments and Contingencies - Additional Information (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Jan. 31, 2019 | May 30, 2019 | Apr. 30, 2019
Commitments And Contingencies Disclosure [Line Items] |  |  |
Non-cancelable purchase commitments | $ 4,200,000 |  | $ 3,900,000
Loss contingencies |  |  | 0
Tax litigation amount | 600,000 |  |
Cumulative charges of litigation loss | 300,000 |  |
Subsequent Event |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Settlement fund for payment to class members |  | $ 8,650,000 |
Other current assets |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Amount of receivables in other current assets | 300,000 |  |
Global Telecomm Corporation |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Non-cancelable purchase commitments | $ 0 |  | $ 700,000

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- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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