Note 9 - Stockholders' Equity (Details Textual) - $ / shares	Jun. 30, 2022	Dec. 31, 2021	Jun. 16, 2021
Preferred Stock and Common Stock, Shares Authorized (in shares)	40,000,000
Preferred Stock, Shares Authorized (in shares)	30,000,000	30,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares Authorized (in shares)	10,000,000	10,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.125	$ 0.125	$ 0.125
Common Stock, Shares, Issued, Total (in shares)	2,647,383	2,647,383