Note 15 - Equity Incentive Plans (Tables)

12 Months Ended

Jun. 30, 2024

Notes Tables

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

						Weighted
						Average
				Weighted		Remaining
	Number of			Average		Contractual
	Options			Exercise Price		Life in Years
Outstanding at June 30, 2023		52,762		$	18.37		9.1
Granted		113,500		$	1.74		9.2
Forfeited/cancelled		(16,610	)	$	3.20		—
Expired		(3,113	)	$	66.84		—
Outstanding at June 30, 2024		146,539		$	6.18		8.8
Exercisable at June 30, 2024		25,068		$	26.06		8.0

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

					Weighted
					Average
					Remaining
			Weighted		Contractual
Range of	Number of		Average		Life of		Number of		Weighted
Exercise	Options		Exercise		Options		Options		Average
Prices	Outstanding		Price		Outstanding		Exercisable		Exercise Price
$1.73		102,000	$	1.73		9.1		—	$	—
$2.53		1,500	$	2.53		9.6		—	$	—
$4.00 - $290.00		43,039	$	16.85		8.1		25,068	$	225.74
		146,539	$	6.18		8.8		25,068	$	225.74

Nonvested Restricted Stock Shares Activity [Table Text Block]

				Weighted
				Average Grant
	Number of			Date Fair
	Shares			Value
Unvested at June 30, 2023		38,075		$	142.20
Granted		12,500		$	1.77
Vested		(25,971	)	$	113.37
Forfeited/cancelled		(499	)	$	147.15
Unvested at June 30, 2024		24,105		$	100.34

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

				Weighted
				Average Grant
	Number of			Date Fair
	Shares			Value
Unvested at June 30, 2023		4,963		$	25.62
Vested		(2,249	)	$	24.28
Forfeited/cancelled		(939	)	$	31.60
Unvested at June 30, 2024		1,775		$	24.14

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

	Year Ended
	June 30,
	2024		2023
	(in thousands)
Cost of sales	$	2	$	28
Research and development		6		30
Selling and marketing		—		23
General and administrative		2,905		5,965
Total stock-based compensation expense	$	2,913	$	6,046