Note 4 - Net Income Per Share (Tables)

9 Months Ended

Dec. 31, 2017

Notes Tables

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

	Quarter Ended Dec. 31
	2017		2016
Weighted average common shares outstanding – basic		4,841,369		4,836,336
Dilutive effect of stock options		5,921		3,441
Shares used in computing net income per share – diluted		4,847,290		4,839,777

	Nine Months Ended Dec. 31
	2017		2016
Weighted average common shares outstanding – basic		4,841,130		4,835,639
Dilutive effect of stock options		4,906		2,176
Shares used in computing net income per share – diluted		4,846,036		4,837,815