Note 10 - Shareholders' Equity - Shares Reserved (Details)	Sep. 30, 2020 shares
Common stock reserved for future issuance (in shares)	2,815,067
Stock Options Outstanding [Member]
Common stock reserved for future issuance (in shares)	1,395,399
Deferred Share Units [Member]
Common stock reserved for future issuance (in shares)	47,237
The 2019 Omnibus Incentive Plan [Member]
Common stock reserved for future issuance (in shares)	1,107,431
Common Share Purchase Warrants [Member]
Common stock reserved for future issuance (in shares)	265,000