Note 13 - Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

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

	Outstanding		Exercisable
January 1, 2025		8,868		1,935
Granted		346,500		—
Vested		—		5,201
Canceled or expired		—		—
Exercised		—		—
September 30, 2025		355,368		7,136

Nonvested Restricted Stock Shares Activity [Table Text Block]

				Weighted-Average
	Number of			Grant Date
	Shares			Fair Value Per Share
January 1, 2025		111		$	22.78
Issuance of restricted common stock		—		$	-
Vested		(111	)	$	22.78
Cancelled		—		$	-
September 30, 2025		—		$	-

	Number of Shares			Weighted- Average Grant-Date Fair Value Per Share
Non-vested as of January 1, 2025		44,119		$	3.91
Granted		68,084		$	5.96
Vested		(32,788	)	$	3.05
Cancelled		—		$	—
Non-vested as of September 30, 2025		79,415		$	5.98

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2025		2024		2025		2024
Research and development	$	58	$	23	$	160	$	68
Sales and marketing		3		—		25		1
General and administrative		77		35		230		97
Total stock-based compensation	$	138	$	58	$	415	$	166