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Note 13 - Equity-based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

(in thousands, except years and per share data)		Awards*				Weighted- Average Exercise Price*				Weighted- Average Remaining Contractual Life (years)				Aggregate Intrinsic Value
Outstanding at December 31, 2023			4			$	1,145.87				7.3			$	1
Restricted stock units granted			5			$	—
Options forfeited/cancelled			(2	)		$	535.07
Outstanding at September 30, 2024			7			$	470.76				8.5			$	4
Vested and expected to vest at September 30, 2024			7			$	474.75				8.5			$	4
Vested and exercisable at September 30, 2024			1			$	2,122.83				4.7			$	—

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2024				2023				2024				2023
Research and development		$	3			$	5			$	12			$	16
Sales and marketing			8				18				48				49
General and administrative			11				39				77				136
Total stock-based compensation expense		$	22			$	62			$	137			$	201

Employees and Directors [Member]

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Assumption		For the Nine Months Ended September 30, 2023
Expected price volatility			152.99	%
Expected term (in years)			6.81
Risk-free interest rate			3.47	%
Dividend yield			0.00	%
Weighted-average fair value of options granted during the period		$	58.57

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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