Note 5 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

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

	Options outstanding			Weighted average price per share		Weighted average remaining life		Aggregate intrinsic Value(1)
Balance, December 31, 2022		28,484,549		$	0.19
Granted		1,320,498			0.20
Balance, March 31, 2023		29,805,047			0.19		7.5		678,000
Balance, December 31, 2023		41,108,448		$	0.19
Granted		1,547,938		$	0.30
Balance, March 31, 2024		42,656,386		$	0.19		7.4	$	5,909,000
Unvested		(5,025,052	)	$	0.20
Vested, March 31, 2024		37,631,334		$	0.19		7.4	$	4,455,000

	Options Outstanding		Weighted average price per share		Weighted average remaining life			Aggregate intrinsic Value(1)
Balance, December 31, 2022		1,904,085	$	0.56
Expired		—		—
Balance, March 31, 2023		1,904,085	$	0.56		1.5	$	—
Balance, December 31, 2023		1,564,085	$	0.61
Expired		—		—
Balance, March 31, 2024		1,564,085	$	0.61		0.9	$	—

	Non-plan Options outstanding			Weighted average price per share		Weighted average remaining life		Aggregate intrinsic Value(1)
Balance, December 31, 2022		19,023,829		$	0.39
Granted		48,804		$	0.20
Balance, March 31, 2023		19,072,633		$	0.39		4.1	$	88,000
Balance, December 31, 2023		17,375,044		$	0.39
Expired		(275,376	)	$	0.44
Balance, March 31, 2024		17,099,668		$	0.39		3.1	$	695,000
Unvested		(1,056,177	)	$	0.26
Vested, March 31, 2024		16,043,491		$	0.40		3.1	$	437,000