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Note 7 - Stock-based Compensation (Details Textual) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 31, 2020 USD ($) shares	Jul. 31, 2020 USD ($) shares
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	534,670	534,670
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance (in shares)	0	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 Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $	$ 1,900	$ 1,900
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		2 years 36 days

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Topic 210
-SubTopic 10
-Section S99
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