Note 9 - Preferred Stock and Common Stock Warrants (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Allocation of Net Cash Proceeds [Table Text Block]

				Allocation of Proceeds
						2022 Series C
				2022 Series C		Preferred
				Warrants		Stock
Gross proceeds	$	10,500
Equity issuance costs		(20	)
Net proceeds - Initial Fair Value Allocation	$	10,480		$	644	$	9,836
Per balance sheet upon issuance				$	644	$	9,836

				Allocation of Proceeds
						2021 Series C
				2021 Series C		Preferred
				Warrants		Stock
Gross proceeds	$	39,500
Equity issuance costs		(62	)
Net proceeds - Initial Fair Value Allocation	$	39,438		$	1,631	$	37,807
Per balance sheet upon issuance				$	1,631	$	37,807

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	December 31,			December 31,
	2022			2021
Stock price	$	4.94		$	2.85
Exercise price	$	0.01		$	0.01
Risk-free rate		4.6	%		0.1	%
Volatility		52.5	%		62.6	%
Term (years)		1.5			1.6