Note 13 - Stock Based Compensation - Summary of Stock Option Activity (Details) - $ / shares		12 Months Ended
Sep. 02, 2015	Mar. 31, 2019	Mar. 31, 2018
Outstanding, beginning of year (in shares)		3,000,000	3,000,000
Outstanding, weighted average exercise price (in dollars per share)		$ 0.20	$ 0.20
Issued (in shares)	3,000,000
Issued, weighted average exercise price (in dollars per share)	$ 0.20
Exercised (in shares)
Exercised, weighted average exercise price (in dollars per share)
Expired (in shares)		3,000,000
Expired, weighted average exercise price (in dollars per share)
Outstanding, end of year (in shares)			3,000,000
Outstanding, weighted average exercise price (in dollars per share)		$ 0	$ 0.20
Exercisable, end of year (in shares)			3,000,000
Exercisable, weighted average exercise price (in dollars per share)		$ 0	$ 0.20

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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