Note 5 - Net Income per Share (Tables)

6 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

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

	Three Months Ended		Three Months Ended
	September 30, 2016		September 30, 2015
Basic net income per share computation:
Net income	$	272,055	$	199,466
Weighted-average common shares outstanding		3,255,887		3,256,887
Basic net  income per share	$	0.08	$	0.06
Diluted net income per share computation
Net income	$	272,055	$	199,466
Less: Change in fair value of warrants		34,000		-
Diluted income	$	238,055		199,466
Weighted-average common shares outstanding		3,255,887		3,256,887
Incremental shares attributable to the assumed exercise of outstanding stock options and warrants		10,246		3,912
Total adjusted weighted-average shares		3,266,133		3,260,799
Diluted net  income per share	$	0.07	$	0.06

	Six Months Ended		Six Months Ended
	September 30, 2016		September 30, 2015
Basic net income per share computation:
Net income	$	682,364	$	478,532
Weighted-average common shares outstanding		3,255,887		3,256,887
Basic net  income per share	$	0.21	$	0.15
Diluted net income per share computation
Net income	$	682,364	$	478,532
Change in fair value of warrants		33,000		-
Diluted income	$	649,364		478,532
Weighted-average common shares outstanding		3,255,887		3,256,887
Incremental shares attributable to the assumed exercise of outstanding stock options and warrants		11,305		5,171
Total adjusted weighted-average shares		3,267,192		3,262,058
Diluted net  income per share	$	0.20	$	0.15

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:

	September 30, 2016		September 30, 2015
Stock options		75,000		99,500
Warrants		-		286,920
		75,000		386,420