Note 7 - Accounts Payable and Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	June 30, 2023		December 31, 2022
Patent and legal costs	$	103	$	135
Accrued compensation		777		1,100
Warranty costs		75		125
Pre-funding of the sale of shares, preferred stock and warrants		7,350		-
Taxes and other		257		103
Total	$	8,562	$	1,463

Schedule of Product Warranty Liability [Table Text Block]

	Six Months Ended June 30,
	2023			2022
Balance, beginning of period	$	125		$	96
Warranty settlements		(6	)		(63	)
Warranty provision		(44	)		45
Balance, end of period	$	75		$	78