Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

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

	Year Ended March 31
	2020		2019
Weighted average common shares outstanding – basic		4,845,627		4,844,010
Dilutive effect of stock options		1,667		6,557
Shares used in computing net income per share – diluted		4,847,294		4,850,567