Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Dec. 31, 2019	Mar. 31, 2019
Accounts receivable, allowance for doubtful accounts	$ 91,536	$ 66,748
Note receivable, unamortized discount, current	884,958	0
Intangible assets, accumulated amortization	3,745	3,745
Note receivable, unamortized discount, noncurrent	383,867	0
Notes and convertible notes payable, unamortized discount, current	1,008,086	799,410
Note payable, unamortized discount, noncurrent	$ 0	$ 13,929
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	600,000,000	600,000,000
Common stock, shares issued (in shares)	270,553,352	240,627,102
Common stock, shares outstanding (in shares)	270,553,352	240,627,102