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Note 15 - Equity-based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

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, 2021			4,449			$	1.39				7.6			$	460
Options granted			336			$	0.30
Restricted stock units granted			180			$	—
Restricted stock units vested			(120	)		$	—
Options forfeited/cancelled			(37	)		$	8.05
Restricted stock units cancelled			(30	)		$	—
Outstanding at June 30, 2022			4,778			$	1.25				7.4			$	308
Vested and expected to vest at June 30, 2022			4,446			$	1.31				7.3			$	272
Vested at June 30, 2022			2,280			$	2.24				5.6			$	—
Exercisable at June 30, 2022			2,280			$	2.24				5.6			$	—

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

		Three Months Ended June 30,								Six Months Ended June 30,
		2022				2021				2022				2021
Research and development		$	5			$	3			$	9			$	7
Sales and marketing			13				34				25				65
General and administrative			136				259				304				407
Total stock-based compensation expense		$	154			$	296			$	338			$	479

Employees and Directors [Member]

Notes Tables

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

		Six Months Ended June 30,
Assumption		2022				2021
Expected price volatility			160.41	%			164.31	%
Expected term (in years)			6.45				6.19
Risk-free interest rate			1.65	%			1.09	%
Dividend yield			0.00	%			0.00	%
Weighted-average fair value of options granted during the period		$	0.29			$	0.90

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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