Note 13 - Warrants and Derivative Liabilities - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) $ in Millions	Dec. 31, 2020 USD ($)	Oct. 01, 2020 USD ($)
Fair value	$ 6.7	$ 4.0
Measurement Input, Revenue Risk Premium [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.069	0.071
Measurement Input, Revenue Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.3	0.3
Measurement Input, Share Price [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	23.42	14.23
Measurement Input, Payment Delay [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	80