Note 13 - Stockholders Equity (Details Textual) - USD ($)					3 Months Ended																12 Months Ended		49 Months Ended
	May 10, 2022	Aug. 31, 2021	May 18, 2021	Oct. 01, 2018	Jun. 30, 2023		Mar. 31, 2023	[1]	Dec. 31, 2022	[1]	Sep. 30, 2022	[1]	Jun. 30, 2022		Mar. 31, 2022	[1]	Dec. 31, 2021	[1]	Sep. 30, 2021	[1]	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	May 09, 2019	Jan. 01, 2013
Stock Repurchased During Period, Shares (in shares)					47,847	[1]	74,150		88,741		20,859		192,747	[1]	538,376		244,552		7,600		231,597	983,275	1,945,666
Treasury Stock, Common, Shares (in shares)					0																0		0
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount					$ 4,800,000																$ 4,800,000		$ 4,800,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)																					3 years
Preferred Stock, Par or Stated Value Per Share (in dollars per share)					$ 0.01								$ 0.01								$ 0.01	$ 0.01	$ 0.01
Stock Repurchase Program, Authorized Amount			$ 8,000,000.0		$ 21,000,000.0																$ 21,000,000.0		$ 21,000,000.0	$ 4,000,000.0
Stock Repurchase Program, Increase in Authorized Amount	$ 9,000,000.0	$ 4,000,000.0	$ 4,000,000
Shares Acquired, Average Cost Per Share					$ 6.86	[1]	$ 5.79		$ 5.05		$ 4.97		$ 4.78	[1]	$ 6.95		$ 5.85		$ 5.43				$ 5.91
Stock Repurchase Program, Remaining Authorized Repurchase Amount					$ 9,507,781																$ 9,507,781		$ 9,507,781
Blank Check [Member]
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
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)					700,000								700,000								700,000	700,000	700,000
Preferred Stock, Shares, Number (in shares)																					700,000
Preferred Stock, Shares Issued (in shares)					625,375								625,375								625,375	625,375	625,375
Series B-1 Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)					550,000								550,000								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)					$ 10.70																$ 10.70		$ 10.70
Preferred Stock, Shares Issued (in shares)					212,402								212,402								212,402	212,402	212,402
Share-Based Payment Arrangement [Member] | Amended 2011 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)																									675,000
Restricted Stock Units (RSUs) [Member] | Amended 2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested and Issued (in shares)																					25,995	16,480
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)					35,054																35,054		35,054
Director [Member]
Deferred Compensation Cash-Based Arrangements, Liability, Current				$ 75,000
Deferred Compensation Cash-Based Arrangements, Liability, Per Quarter				18,750
Director [Member] | Share-Based Payment Arrangement [Member] | Amended 2011 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)																					38,291	59,988
Independent Directors [Member] | Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested				$ 150,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				5 years
Employees and Consultants [Member] | Share-Based Payment Arrangement [Member] | Amended 2011 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)																					43,523	31,890

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