Note 12 - Stock Based Compensation - Summary of Stock Option Activity (Details) - $ / shares		12 Months Ended
	Sep. 02, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2014	Mar. 31, 2013
Outstanding, beginning of year (in shares)		3,000,000	600,000
Outstanding, beginning of year (in dollars per share)		$ 0.20	$ 0.01
Issued (in shares)	3,000,000		3,000,000		5,600,000
Issued (in dollars per share)	$ 0.20		$ 0.20
Exercised (in shares)				(5,000,000)
Exercised (in dollars per share)
Outstanding, end of year (in dollars per share)		$ 0.20	$ 0.20
Exercisable, end of year (in shares)		3,000,000	3,000,000
Exercisable, end of year (in dollars per share)		$ 0.20	$ 0.20
Expired (in shares)			(600,000)
Expired (in dollars per share)			$ (0.01)
Outstanding, end of year (in shares)		3,000,000	3,000,000