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Note 18 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

		For the Years Ended December 31,
		2023				2022
United States		$	(9,640	)		$	(10,608	)
International			—				—
		$	(9,640	)		$	(10,608	)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

		For the Years Ended December 31,
		2023				2022
Current
Federal		$	—			$	—
State			—				—
Other			—				—
Total current tax expense		$	—			$	—
Deferred
Federal			—				—
State			—				—
Other			—				—
Total deferred tax expense		$	—			$	—
Income tax provision		$	—			$	—

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

		For the Years Ended December 31,
		2023				2022
Deferred tax assets:
Net operating losses		$	36,943			$	35,234
Acquisition assets			2,257				—
Stock options			665				750
Research and development credits			641				641
Accruals			477				464
Operating lease liabilities			368				472
Property and equipment			28				13
Other deferred tax assets			6				331
Total deferred tax assets			41,385				37,905
Deferred tax liabilities:
Operating lease right-of-use assets			(337	)			(472	)
Total deferred tax liabilities			(337	)			(472	)
Valuation allowance			(41,048	)			(37,433	)
Net deferred taxes		$	—			$	—

Summary of Operating Loss Carryforwards and Tax Credit Carryforwards [Table Text Block]

					Expiration
		Amount			Years
Net operating losses, federal (Post December 31, 2017)		$	44,443		Does Not Expire
Net operating losses, federal (Pre January 1, 2018)		$	94,886		Beginning in 2024
Net operating losses, state		$	117,375		Beginning in 2028
Tax credits, federal		$	542		Beginning in 2031
Tax credits, state		$	125		Indefinite

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

		For the Years Ended December 31,
		2023				2022
Unrecognized benefit - beginning of period		$	974			$	974
Change during the period			—				—
Unrecognized benefit - end of period		$	974			$	974

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

		For the Years Ended December 31,
		2023				2022
Statutory rate			21.0	%			21.0	%
State tax			4.5	%			7.9	%
Change in valuation allowance			(19.5	%)			(48.0	%)
Warrant/equity expenses			(3.7	%)			20.2	%
Stock-based compensation expense			(1.4	%)			(4.2	%)
Impairment of assets			(0.9	%)			—	%
Other			(0.1	%)			(0.1	%)
Change in value of earnout			—	%			3.2	%
Total			0.0	%			0.0	%

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