Note 3 - Equity (Details Textual) - USD ($)		3 Months Ended					14 Months Ended	16 Months Ended	44 Months Ended
		Dec. 31, 2022		Sep. 30, 2022		Aug. 31, 2021	May 18, 2021	Dec. 31, 2022	Dec. 31, 2022	Jul. 01, 2022	Jun. 30, 2022	May 09, 2019
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance										906,155
Preferred Stock, Shares Authorized		30,000,000						30,000,000	30,000,000		30,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01						$ 0.01	$ 0.01		$ 0.01
Stock Repurchase Program, Authorized Amount		$ 21,000,000				$ 4,000,000	$ 8,000,000	$ 21,000,000	$ 21,000,000			$ 4,000,000.0
Stock Repurchase Program, Increase in Authorized Amount						$ 12,000,000	$ 4,000,000	9,000,000
Stock Repurchased During Period, Shares		88,741	[1]	20,859	[1]				1,823,669
Treasury Stock Acquired, Average Cost Per Share		$ 5.05	[1]	$ 4.97	[1]				$ 5.89
Stock Repurchase Program, Remaining Authorized Repurchase Amount	[1]	$ 10,265,181		$ 10,713,447				$ 10,265,181	$ 10,265,181
Blank Check [Member]
Preferred Stock, Shares Authorized		30,000,000						30,000,000	30,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01						$ 0.01	$ 0.01
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized		700,000						700,000	700,000		700,000
Preferred Stock, Shares, Number		700,000
Preferred Stock, Shares Issued		625,375						625,375	625,375		625,375
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		625,375						625,375	625,375		625,375
Series B-1 Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share		$ 550,000						$ 550,000	$ 550,000		$ 550,000
Preferred Stock, Shares, Number		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		$ 10.70						$ 10.70	$ 10.70
Preferred Stock, Shares Issued		212,402						212,402	212,402		212,402
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		212,402						212,402	212,402		212,402
Share-Based Payment Arrangement, Nonemployee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		941,631						941,631	941,631
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 5,000,000.0						$ 5,000,000.0	$ 5,000,000.0
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		1 year 4 months 9 days
Restricted Stock Units (RSUs) [Member] | Vested and Unissued [Member] | Share-Based Payment Arrangement, Nonemployee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		19,202						19,202	19,202

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