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Note 15 - Equity-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

(in thousands, except years and per share data)		Options				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Life (years)				Aggregate Intrinsic Value
Outstanding at December 31, 2021			127			$	48.77				7.6			$	460
Options granted			19			$	9.62
Restricted stock units granted			5			$	—
Restricted stock units vested			(3	)		$	—
Options forfeited/cancelled			(15	)		$	93.48
Restricted stock units cancelled			(1	)			—
Outstanding at December 31, 2022			132			$	37.99				7.5			$	69
Vested and expected to vest at December 31, 2022			97			$	50.41				7.1			$	10
Vested at December 31, 2022			63			$	68.89				6.2			$	—
Exercisable at December 31, 2022			63			$	68.89				6.2			$	—

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

		For the Years Ended December 31,
		2022				2021
Research and development		$	20			$	10
Sales and marketing			52				129
General and administrative			148				794
Total stock-based compensation expense		$	220			$	933

Employees and Directors [Member]

Notes Tables

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

		For the Years Ended December 31,
Assumptions		2022				2021
Expected price volatility			158	%			164	%
Expected term (in years)			6.45				6.19
Risk-free interest rate			2.36	%			1.05	%
Dividend yield			0.00	%			0.00	%
Weighted-average fair value of options granted during the period		$	9.22			$	22.37

X

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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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