Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Weighted Average Number of Shares [Table Text Block]

	Year Ended March 31
	2021		2020
Weighted average common shares outstanding – basic		4,834,054		4,845,627
Dilutive effect of stock options		408		1,667
Shares used in computing net income per share – diluted		4,834,462		4,847,294