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Note 12 - Capital Stock (Details Textual)				12 Months Ended
	Apr. 06, 2021 USD ($) $ / shares shares	Jun. 02, 2020 USD ($) shares	May 28, 2020 $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 shares
Proceeds from Issuance of Common Stock | $				$ 62,850,213	$ 59,549,751
Payments of Stock Issuance Costs | $				$ 3,663,291	$ 3,428,355
Class of Warrant or Right, Outstanding (in shares)				105,556	105,556	105,556
Warrants for Common Class B Stock [Member]
Class of Warrant or Right, Outstanding (in shares)				104,772
Warrants for Common Class A Stock [Member]
Class of Warrant or Right, Outstanding (in shares)				784
Common Class A [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares				$ 0.001	$ 0.001
Common Class B [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares				$ 0.001	$ 0.001
Common Stock, Voting Rights Per Share				10
Underwriting Agreement [Member] | Common Class A [Member]
Share Offering, Number of Shares Authorized (in shares)			3,200,000
Share Price (in dollars per share) | $ / shares			$ 16.00
Stock Option, Exercisable, Remaining Contractual Term (Day)			30 days
Stock Option, Number of Securities Called by Each Stock Option (in shares)			480,000
Stock Issued During Period, Shares, New Issues (in shares)		3,680,000
Proceeds from Issuance of Common Stock | $		$ 58,900,000
Underwriting Agreement [Member] | Common Class A [Member] | Adam Peterson and Alex Rozek, a Board Member, and Employee [Member]
Stock Issued During Period, Shares, New Issues (in shares)			39,375
Public Offering Including Over-allotment Option [Member] | Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,645,000
Public Offering [Member] | Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,345,000
Proceeds from Issuance of Common Stock | $	$ 58,625,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 0.001
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 25.00
Stock Sale Agreement, Percent of Gross Proceeds	5.50%
Proceeds from Issuance of Common Stock, Net | $	$ 55,400,625
Payments of Stock Issuance Costs | $	$ 133,169
Over-Allotment Option [Member] | Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares)	345,000
Sold by Selling Stockholder [Member] | Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares)	300,000

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