Note 12 - Income Taxes (Details Textual) - USD ($)	3 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Operating Loss Carryforwards, Total	$ 2,850,000
Operating Loss Carry-Forward, Amount Utilized	$ 40,000
Effective Income Tax Rate Reconciliation, Percent, Total	31.00%	32.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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