Note 10 - Subsequent Events (Details Textual) - Forecast [Member] - Series B Preferred Stock [Member] - Series B Private Placement [member] - Certain Investors, Including Affiliates of Park West Asset Management Llc and Msd Capital [member] $ in Millions	3 Months Ended
	Jun. 30, 2020 USD ($) shares
Stock Issued During Period, Shares, New Issues | shares	8,000
Proceeds from Issuance of Private Placement | $	$ 8