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Note 10 - Stock-Based Compensation - Deferred Stock (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
Deferred compensation liabilities		$ 815

X

- Definition

Amount of the liabilities, classified as other, for deferred compensation arrangements payable after one year or the operating cycle, if longer.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant