Note 13 - Stock Based Compensation - Summary of Stock Option Activity (Details) - $ / shares		3 Months Ended
	Jan. 13, 2020	Jun. 30, 2020	Jun. 30, 2019
Outstanding, beginning of year (in shares)		300,000
Outstanding, weighted average exercise price (in dollars per share)		$ 0.20
Issued (in shares)	300,000
Issued, weighted average exercise price (in dollars per share)	$ 0.20
Exercised (in shares)
Exercised, weighted average exercise price (in dollars per share)
Expired (in shares)
Expired, weighted average exercise price (in dollars per share)
Outstanding, end of period (in shares)		300,000
Outstanding, end of period (in dollars per share)		$ 0.20
Exercisable, end of period (in shares)
Exercisable, end of period (in dollars per share)