Note 7 - Accounts Payable and Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	September 30,		December 31,
	2021		2020
Patent and legal costs	$	22	$	65
Accrued compensation		972		563
Warranty costs		82		48
Consulting costs		269		2
Taxes and other		21		43
	$	1,366	$	721