Note 7 - Capital and Other Components of Equity - Warrants (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Mar. 31, 2022
Number outstanding (in shares)		32,390	32,390
Amount		$ 161	$ 161
Over-Allotment Option Warrants Issued in May 2018 [Member]
Number outstanding (in shares)	[1]	824,218	824,218
Amount	[1]	$ 0	$ 10
Warrants Issued December 27, 2017 [Member]
Number outstanding (in shares)	[2]	884,120	884,120
Amount	[2]	$ 0	$ 0
Derivative Liability Warrants [Member]
Number outstanding (in shares)		1,708,338	1,708,338
Amount		$ 0	$ 10
Broker Warrants Issued December 2017 [Member]
Number outstanding (in shares)	[3]	32,390	32,390
Amount	[3]	$ 161	$ 161

[1] Warrants to acquire one common share at an exercise price of CAD $10.48, expiring on May 9, 2023.

[2] Warrants to acquire one common share at an exercise price of $10.08, expiring on December 27, 2022.

[3] Warrants to acquire one common share at an exercise price of $10.10, expiring on December 19, 2022.