Note 14 - Equity - Warrant Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Balance, warrant (in shares)	753,775	1,733,856
Balance, exercise price, warrant (in dollars per share)	$ 0.17	$ 0.14
Granted, warrant (in shares)	3,000,000	0
Granted, exercise price, warrant (in dollars per share)	$ 0.07
Expired / Canceled, warrant (in shares)	(603,375)	(980,081)
Expired / Canceled, exercise price, warrant (in dollars per share)	$ 0.01	$ 0.15
Exercised, warrant (in shares)	(400)	0
Exercised, exercise price, warrant (in dollars per share)	$ 0.01
Exercised, exercise price, warrant (in dollars per share)	$ 0.01
Balance, warrant (in shares)	3,150,000	753,775
Balance, exercise price, warrant (in dollars per share)	$ 0.10	$ 0.17