Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2023	Dec. 31, 2022
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	600,000,000	600,000,000
Common Stock, Shares, Outstanding (in shares)	26,443,649	26,334,953
Common stock, issued (in shares)	26,443,649	26,334,953