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Revenue Recognition - Cumulative Effects of Adjustments on Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Apr. 30, 2018	Feb. 01, 2018	Jan. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred revenue, current	$ 546		$ 307
Retained earnings	251,302		$ 261,265
Topic 606 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred revenue, current		$ 264
Retained earnings		261,308
Topic 606 [Member] | Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred revenue, current	3,304	(43)
Retained earnings	$ (3,555)	$ 43

X

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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