Note 6 - Net Income (Loss) per Share (Tables)

3 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

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

	Three Months Ended			Three Months Ended
	June 30, 2017			June 30, 2016
Basic net (loss) income per share computation:
Net (loss) income	$	(286,091	)	$	410,309
Weighted-average common shares outstanding		3,255,887			3,255,887
Basic net (loss) income per share	$	(0.09	)	$	0.13
Diluted net (loss) income per share computation
Net (loss) income	$	(286,091	)	$	410,309
Add: Change in fair value of warrants		95,000			92,100
Diluted (loss) income	$	(381,091	)		318,209
Weighted-average common shares outstanding		3,255,887			3,255,887
Incremental shares attributable to the assumed exercise of outstanding stock options and warrants		10,653			18,942
Total adjusted weighted-average shares		3,266,540			3,274,829
Diluted net (loss) income per share	$	(0.12	)	$	0.10

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:

	June 30, 2017		June 30, 2016
Stock options		79,000		65,000
Warrants		-		186,920
		79,000		251,920