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

12 Months Ended

Jun. 30, 2023

Notes Tables

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

				Weighted
	Shares			Average
				Exercise Price
Outstanding at June 30, 2021		9,183		$	157.50
Granted		29,200			19.20
Exercised		—			—
Canceled or expired		(4,099	)		148.80
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

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
$10.38 – $19.20		35,495		8.89	$	17.99		9,733	$	19.20
$55.50 – $84.90		431		5.26		62.22		431		62.22
$159.00 – $175.50		2,240		3.86		168.82		2,240		168.82
$10.38 – $175.50		38,166		8.55	$	27.34		12,404	$	46.77

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

				Weighted
				Average
	Shares			Grant-Date
				Fair Value
Outstanding at June 30, 2021		67,423		$	61.50
Granted		40,000			18.90
Vested		(23,090	)		62.40
Canceled or expired		(8,461	)		60.60
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

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

	Year Ended		Year Ended
(in thousands)	June 30, 2023		June 30, 2022
Selling, Administration and General	$	1,457	$	1,503
Research & Development		41		32
Total	$	1,498	$	1,535

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

	Year Ended			Year Ended
	June 30, 2023			June 30, 2022
Expected Dividend Yield		—			—
Expected Volatility		104.67	%		104.97	%
Risk-Free Interest Rates		1.59	%		0.65	%
Expected Option Life (in years)		3.5			3.5
Weighted-average grant-date fair value of options awarded	$	20.22		$	25.80