Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2023	Dec. 31, 2022
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized (in shares)	5,000,000	5,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized (in shares)	43,000,000	43,000,000
Common stock, shares outstanding (in shares)	19,576,304	19,476,671
common stock, shares issued (in shares)	19,576,304	19,476,671
common stock, shares issued (in shares)	19,576,304	19,476,671
Common stock, shares outstanding (in shares)	19,576,304	19,476,671