Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2017

Notes Tables

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

	Year Ended March 31
	2017		2016		2015
Weighted average common shares outstanding – basic		4,836,602		4,850,209		4,855,504
Dilutive effect of stock options		1,787		2,393		16,431
Shares used in computing net income per share – diluted		4,838,389		4,852,602		4,871,935