Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

	Year Ended
	December 31, 2024			December 31, 2023
Income tax benefit at statutory rates	$	333,560		$	2,131,064
Valuation allowance for deferred tax assets		(424,218	)		(1,439,931	)
Stock-based compensation		367,824			(525,278	)
Fixed assets		(187,429	)		—
Other income (expense), net		(150,061	)		(181,050	)
Reported income tax expense	$	(60,324	)	$	(15,195	)
Effective tax rate:		3.4	%		0.1	%

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

	December 31, 2024			December 31, 2023
Deferred tax assets:
Net operating loss carryforwards	$	21,368,607		$	20,088,873
Intangible assets		2,115,891			2,258,079
Property and equipment		618,260			1,104,854
Research and development credits		219,488			235,514
Research and development		206,718			268,414
Inventory		95,762			246,182
Accrued expenses		367,651			496,695
Right of use asset		10,873			7,366
Allowance for credit losses		94,113			64,250
Charitable contributions		34,613			40,773
Unexercised options		1,132,698			890,128
Total deferred tax assets		26,264,674			25,701,128
Valuation allowance		(26,264,674	)		(25,701,128	)
Total net deferred tax assets	$	—		$	—

Summary of Operating Loss Carryforwards [Table Text Block]

	December 31, 2024		December 31, 2023
NOLs and other income tax carryforwards
Federal NOLs pre-2017 (1)	$	1,868,077	$	1,868,077
Federal NOLs post-2018 (2)		82,744,578		77,796,820
State NOLs (3)		60,941,124		57,103,123
Total NOLs		145,553,779		136,768,020
Credits (4)		219,488		235,514
Other carryforwards (4)		1,333,552		581,020
Total NOLs and other income tax carryforwards	$	147,106,819	$	137,584,554
(1) Can be carried forward for 20 years and which begin to expire in 2036
(2) Can be carried forward indefinitely.
(3) Can be carried forward for between 15 and 20 years and which begin to expire in 2031.
(4) Can be carried forward for between one and five years and which begin to expire in 2025.