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Note 1 - Description of Business	12 Months Ended
Note 1 - Description of Business	Mar. 31, 2018
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	NOTE 1. DESCRIPTION OF BUSINESS We develop and sell devices that use spintronics, a nanotechnology that relies on electron spin rather than electron charge to acquire, store, and transmit information. We operate in one reportable segment.