Note 7 - Accounts Payable and Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	September 30,		December 31,
	2022		2021
Patent and legal costs	$	131	$	28
Accrued compensation		759		628
Warranty costs		88		96
Taxes and other		13		72
	$	991	$	824

Schedule of Product Warranty Liability [Table Text Block]

	Nine months Ended September 30,
	2022			2021
Balance, beginning of period	$	96		$	48
Warranty settlements		(63	)		(16	)
Warranty provision		55			42
Balance, end of period	$	88		$	74