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Note 7 - Stock-based Compensation (Details Textual) $ in Millions	3 Months Ended
	Apr. 30, 2020 USD ($) shares
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	641,623
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)	0
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $	$ 0.1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	36 days
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $	$ 1.3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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+ References

No definition available.

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