Note 7 - Net Income (Loss) per Share (Details) - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share - shares	9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-Dilutive Securities	1,125,000	71,000
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-Dilutive Securities	1,000,000	0
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-Dilutive Securities	75,000	71,000
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-Dilutive Securities	50,000	0