Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2022

Notes Tables

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

	Year Ended March 31
	2022		2021
Weighted average common shares outstanding – basic		4,833,661		4,834,054
Dilutive effect of stock options		1,978		408
Shares used in computing net income per share – diluted		4,835,639		4,834,462