Note 1 - Organization and Nature of Operations (Details Textual) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended	6 Months Ended
	Oct. 28, 2019	Sep. 25, 2019	Aug. 25, 2019	Jan. 17, 2018	Sep. 30, 2019	Jun. 30, 2018
Private Placement [Member]
Stock Issued During Period, Shares, New Issues		1,608,430		2,150,001
Stock Issued During Period, Value, New Issues		$ 2,400			$ 2,393	$ 7,988
Shares Issued, Price Per Share		$ 1.4927		$ 5.15
Private Placement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	1,608,430
Stock Issued During Period, Value, New Issues	$ 2,400
Shares Issued, Price Per Share	$ 1.4927
Acquisition of Grandon Investments Limited [Member]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Payments to Acquire Businesses, Gross			$ 100