Note 1 - Organization and Operations (Details Textual)	Oct. 12, 2020 $ / shares shares	Sep. 15, 2020	Dec. 31, 2020 $ / shares	Dec. 31, 2019 $ / shares
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.01	$ 0.01
Common Class A [Member]
Additional Share Issued for Every Two Shares of Common Stock (in shares) | shares	1
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01
Common Class B [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01
Stock Split From [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		3
Stock Split To [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		2