Note 11 - Fair Value Measurements (Details) - USD ($)	6 Months Ended
	Sep. 30, 2019	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Warrants and Rights Outstanding	$ 50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)	$ 3.35
Derivative Liability, Current	$ 116,500	$ 43,500
Warrant, Put Notice	The holder has the right, exercisable at any time, in writing (the “Warrant Put Notice”, to cause the Company, subject to the terms and conditions herein, to purchase from the holder all, or any portion, of the warrant for the warrant put repurchase price (the “Repurchase Price”). The Repurchase Price is the greater of 1) Adjusted EBITDA (as defined below) per share as of the date of the Warrant Put Notice, less $0.01, multiplied by the number of warrants or 2) the product of the current market price per share as of the date of the Warrant Put Notice, less the purchase price of the warrant or warrants, multiplied by the number of warrants, if this amount is higher. “Adjusted EBITDA” means EBITDA, multiplied by 5, plus cash and cash equivalents less unpaid debt divided by the number of shares outstanding on a fully diluted basis. As such, the values of the warrants at September 30, 2019 reflect the higher of these two options for each specific warrant.
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)	50,000
Payments for Repurchase of Warrants	$ 116,500