Note 5 - Net Income per Share (Tables)

9 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended		Three Months Ended
	December 31, 2016		December 31, 2015
Basic net income per share computation:
Net income	$	141,513	$	226,586
Weighted-average common shares outstanding		3,255,887		3,256,887
Basic net  income per share	$	0.04	$	0.07
Diluted net income per share computation
Net income	$	141,513	$	226,586
Less: Change in fair value of warrants		37,000		-
Diluted income	$	104,513		226,586
Weighted-average common shares outstanding		3,255,887		3,256,887
Incremental shares attributable to the assumed exercise of outstanding stock options and warrants		9,248		4,803
Total adjusted weighted-average shares		3,265,135		3,261,690
Diluted net  income per share	$	0.03	$	0.07

	Nine Months Ended		Nine Months Ended
	December 31, 2016		December 31, 2015
Basic net income per share computation:
Net income	$	823,877	$	705,118
Weighted-average common shares outstanding		3,255,887		3,256,887
Basic net  income per share	$	0.25	$	0.22
Diluted net income per share computation
Net income	$	823,877	$	705,118
Change in fair value of warrants		70,000		-
Diluted income	$	753,877		705,118
Weighted-average common shares outstanding		3,255,887		3,256,887
Incremental shares attributable to the assumed exercise of outstanding stock options and warrants		10,645		5,068
Total adjusted weighted-average shares		3,266,532		3,261,955
Diluted net  income per share	$	0.23	$	0.22

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following table summarizes securities that, if exercised, would have an anti-dilutive effect on earnings per share:

	December 31, 2016		December 31, 2015
Stock options		71,000		80,000
Warrants		-		286,920
		71,000		366,920