Note 3 - Equity (Details Textual) - USD ($)				3 Months Ended	9 Months Ended
	May 10, 2022	Aug. 31, 2021	May 18, 2021	Sep. 30, 2022	Sep. 30, 2022	May 09, 2019
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total				$ 5,000,000.0	$ 5,000,000.0
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					1 year 7 months 20 days
Stock Repurchase Program, Authorized Amount		$ 12,000,000	$ 8,000,000	21,000,000	$ 21,000,000	$ 4,000,000.0
Stock Repurchase Program, Increase in Authorized Amount	$ 9,000,000	$ 4,000,000	$ 4,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 10,713,447	$ 10,713,447
Blank Check [Member]
Preferred Stock, Shares Authorized (in shares)				30,000,000	30,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.01	$ 0.01
Series B Preferred Stock [Member]
Preferred Stock, Shares, Number (in shares)				700,000
Preferred Stock, Shares Issued, Total (in shares)				625,375	625,375
Series B-1 Preferred Stock [Member]
Preferred Stock, Shares, Number (in shares)				550,000
Preferred Stock, Cash, Dividend Rate, Percentage				7.00%
Preferred Stock, Series B Preferred Shares, Dividend Rate, Percentage				9.00%
Preferred Stock, Redemption Price Per Share (in dollars per share)				$ 10.70	$ 10.70
Preferred Stock, Shares Issued, Total (in shares)				212,402	212,402
Restricted Stock Units (RSUs) [Member] | Vested and Unissued [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance (in shares)				16,703	16,703