Note 5 - Accrued Expenses and Other Current Liabilities (Details Textual) - USD ($)	Jan. 31, 2021	Nov. 04, 2019
Other Current Liabilities [Member]
Business Combination, Contingent Consideration, Liability, Current	$ 296,000
Schrofftech [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 2,400,000	$ 2,400,000

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478

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