Note 8 - Preferred Stock and Common Stock Warrants (Tables)

6 Months Ended

Jun. 30, 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

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

	June 30,			December 31,
	2022			2021
Stock price	$	4.44		$	2.85
Exercise price	$	0.01		$	0.01
Risk-free rate		2.9	%		0.1	%
Volatility		59.0	%		62.6	%
Term (years)		2.2			1.6