Note 7 - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Number of shares			Weighted average grant date fair value
					$
Outstanding at December 31, 2023		-			-
Granted		-			-
Vested		-			-
Forfeited		-			-
Outstanding at December 31, 2024		-			-
Granted		6,000			1.63
Vested		(3,000	)		1.63
Forfeited		-			-
Outstanding at December 31, 2025		3,000			1.63
Expected to vest at December 31, 2025		3,000			1.63

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

	Number of options			Weighted average exercise price		Weighted average grant  date fair value		Weighted average remaining contractual term		Aggregate intrinsic value
				$		$		Years		$
Outstanding at December 31, 2023		1,865,226			6.46				7.66
Granted		838,939			3.02		2.53
Exercised		(28,666	)		0.95		0.77				34
Forfeited		(149,845	)		7.50		5.73
Outstanding at December 31, 2024		2,525,654			5.32				7.43		455
Granted		224,750			1.34		1.08
Forfeited		(18,598	)		2.67		2.07
Outstanding at December 31, 2025		2,731,806			5.01				6.58		514
Exercisable as of December 31, 2025		2,059,124			4.88				6.61		362
Vested and expected to vest at December 31, 2025		2,452,926			4.32				6.81		514

	Number of options			Weighted average exercise price		Weighted average grant date fair value		Weighted average remaining contractual term		Aggregate intrinsic value
								Years
Outstanding at December 31, 2023		1,257,000			0.50				8.82
Granted		651,333			0.60		0.26
Forfeited		(9,500	)		0.50		0.32
Outstanding at December 31, 2024		1,898,833			0.53				7.63		1,760
Granted		375,344			1.46		1.30
Exercised		(77,250	)		1.12		0.84				26
Forfeited		(7,500	)		0.50		0.23
Outstanding at December 31, 2025		2,189,427			0.67				7.05		2,230
Exercisable as of December 31, 2025		989,749			0.50				6.69		946
Vested and expected to vest at December 31, 2025		2,124,427			0.65				6.98		2,215

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

	For the year ended December 31,
	2024						2025
Fair value of ordinary share		0.90		~	3.60					1.34
Risk-free interest rate		3.84	%	~	4.52	%	3.77	%	~	4.03	%
Expected term (years)		2.89		~	6.25		3.00		~	5.50
Expected volatility		110	%	~	140	%	105	%	~	115	%
Expected dividend yield					0	%				0	%
Contractual life (years)		5		~	10		5		~	10

	For the year ended December 31,
	2024						2025
Fair value of ordinary share		0.19		~	1.46			1.46		~	1.69
Risk-free interest rate		3.51	%	~	4.31	%		3.81	%	~	4.44	%
Expected term (years)		3.75		~	6.25			5.50		~	10
Expected volatility		117.10	%		141.40	%		114.02	%		126.34	%
Expected dividend yield					0	%					0	%
Contractual life (years)		5		~	10						10

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

	Year ended December 31,
	2024		2025
	$		$
Research and development		63		106
General and administrative		2,000		390
Total		2,063		496

	Year ended December 31,
	2024		2025
	$		$
Research and development		50		29
General and administrative		142		196
Total		192		225