Note 7 - Commitments and Contingencies (Details)	3 Months Ended
	Jun. 30, 2016 USD ($) shares
Common Stock | Chief Financial Officer
Stock Issued During Period, Shares, In exchange for a full dismissal with prejudice of all causes | shares	200,000
Initial Complaint Filed by Growblox
Loss Contingency, Damages Sought, Value	$ 75,000
Counterclaim
Loss Contingency, Damages Sought, Value	$ 9,000,000
Settlement agreement, terms	Under the settlement, the Company will deliver 1,400,000 shares of its common stock to its adversaries. Craig Ellins, formerly CEO of the Company and now its chief scientific officer, will deliver 3,000,000 shares that he owns personally. Based on our estimate of potential outcomes, we have accrued
Loss Contingency Accrual, Provision	$ 500,000