Note 3 - Equity (Details Textual) - USD ($)					3 Months Ended			55 Months Ended
		May 10, 2022	Aug. 31, 2021	May 18, 2021	Dec. 31, 2023		Sep. 30, 2023	Dec. 31, 2023	Aug. 29, 2023	Jun. 30, 2023	May 09, 2019
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount					$ 4,900,000			$ 4,900,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					3 years
Preferred Stock, Shares Authorized (in shares)					30,000,000			30,000,000		30,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)					$ 0.01			$ 0.01		$ 0.01
Preferred Stock, Redemption Price Per Share (in dollars per share)									$ 10.7
Preferred Stock, Redemption, Aggerate Purchase Price					$ 8,214,219			$ 8,214,219	$ 8,964,214
Stock Repurchase Program, Authorized Amount			$ 12,000,000	$ 8,000,000	$ 21,000,000,000,000			$ 21,000,000,000,000			$ 4,000,000
Stock Repurchase Program, Increase in Authorized Amount		$ 9,000,000	$ 4,000,000	$ 4,000,000
Stock Repurchased During Period, Shares (in shares)					22,012	[1]	155,025	2,122,703
Shares Acquired, Average Cost Per Share					$ 8.79	[1]	$ 8.53	$ 6.13
Stock Repurchase Program, Remaining Authorized Repurchase Amount					$ 7,992,206			$ 7,992,206
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 Authorized (in shares)					700,000			700,000		700,000
Preferred Stock, Shares, Number (in shares)					700,000
Preferred Stock, Redemption Price Per Share (in dollars per share)	[2]				$ 10.7			$ 10.7
Preferred Stock, Redemption, Aggerate Purchase Price	[2]				$ 6,691,513			$ 6,691,513
Preferred Stock, Shares Issued (in shares)					625,375			625,375		625,375
Series B-1 Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)					550,000			550,000		550,000
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)	[3]				$ 10.7			$ 10.7
Preferred Stock, Redemption, Aggerate Purchase Price	[3]				$ 1,522,706			$ 1,522,706
Preferred Stock, Shares Issued (in shares)					142,309			142,309		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 (in shares)					40,837			40,837

[1] We close our books and records on the last calendar day of each month to align our financial closing with our business processes.

[2] We close our books and records on the last calendar day of each month to align our financial closing with our business processes.

[3] We close our books and records on the last calendar day of each month to align our financial closing with our business processes.