Note 8 - Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2023		2022
Patent and legal costs	$	21	$	135
Accrued compensation		325		1,100
Warranty costs		72		125
Taxes and other		274		103
	$	692	$	1,463

Schedule of Product Warranty Liability [Table Text Block]

	Year Ended December 31,
	2023			2022
Balance, beginning of period	$	125		$	96
Warranty settlements		(169	)		(181	)
Warranty provision		116			210
Balance, end of period	$	72		$	125