Note 10 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans (Tables)

12 Months Ended

Jun. 30, 2024

Notes Tables

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

			Weighted
			Average
	Shares		Exercise Price
Outstanding at June 30, 2022	34,284		$	40.50
Granted	6,962			12.47
Exercised	—			—
Canceled or expired	(3,080	)		139.29
Outstanding at June 30, 2023	38,166		$	27.34
Granted	131,840			10.01
Exercised	—			—
Canceled or expired	(13,378	)		10.70
Outstanding at June 30, 2024	156,628		$	14.18

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

			Options
			Outstanding						Options
			Weighted-						Exercisable
			Average		Weighted-				Weighted-
	Number		Remaining		Average		Number		Average
	Outstanding		Contractual		Exercise		Exercisable		Exercise
Range of exercise prices			Life (years)		Price				Price
$7.47 – $19.20		154,003		8.25	$	11.83		21,379	$	18.55
$55.50 – $84.90		418		4.37		61.52		418		61.52
$159.00 – $175.50		2,207		2.86		168.97		2,207		168.97
$7.47 – $175.50		156,628		8.17	$	14.18		24,004	$	33.13

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

				Weighted
				Average
	Shares			Grant-Date
				Fair Value
Outstanding at June 30, 2022		75,873		$	39.00
Granted		2,150			11.83
Vested		(26,742	)		46.68
Canceled or expired		(610	)		60.60
Outstanding at June 30, 2023		50,671		$	33.43
Granted		20,000			10.10
Vested		(26,898	)		45.50
Canceled or expired		—			—
Outstanding at June 30, 2024		43,773		$	15.36

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Year Ended		Year Ended
(in thousands)	June 30, 2024		June 30, 2023
Selling, Administration and General	$	1,364	$	1,457
Research & Development		114		41
Total	$	1,478	$	1,498

Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

	Year Ended			Year Ended
	June 30, 2024			June 30, 2023
Expected Dividend Yield		—			—
Expected Volatility		99.85	%		104.67	%
Risk-Free Interest Rates		4.36	%		1.59	%
Expected Option Life (in years)		3.5			3.5
Weighted-average grant-date fair value of options awarded	$	11.63		$	20.22