Note 7 - Accounts Payable and Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	September 30, 2023		December 31, 2022
Patent and legal costs	$	61	$	135
Accrued compensation		786		1,100
Warranty costs		109		125
Taxes and other		172		103
Total	$	1,128	$	1,463

Schedule of Product Warranty Liability [Table Text Block]

	Nine Months Ended September 30,
	2023			2022
Balance, beginning of period	$	125		$	96
Warranty settlements		(8	)		(63	)
Release of warranty provision		(8	)		55
Balance, end of period	$	109		$	88