Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue	$ 0	$ 0	$ 0	$ 0
Operating expenses
Research and development	(1,002)	(829)	(1,876)	(1,550)
General and administrative	(947)	(1,812)	(2,683)	(3,146)
Loss from operations	(1,949)	(2,641)	(4,559)	(4,696)
Foreign exchange gain (loss), net	47	(22)	76	(83)
Interest income	28	11	45	40
Other income, net	18	1	18	8
Loss before income tax	(1,856)	(2,651)	(4,420)	(4,731)
Income tax expenses	(22)	0	(42)	0
Net loss from continuing operations	(1,878)	(2,651)	(4,462)	(4,731)
Discontinued operations
Loss from discontinued operations	(2,771)	(1,438)	(6,003)	(2,646)
Gain on sale of subsidiary interests	0	0	6,986	0
Income tax expenses	0	0	0	0
Net income (loss) from discontinued operations	(2,771)	(1,438)	983	(2,646)
Net loss	(4,649)	(4,089)	(3,479)	(7,377)
Less: Net loss attributable to noncontrolling interests from continuing operations	(72)	(58)	(147)	(115)
Less: Net loss attributable to noncontrolling interests from discontinued operations	(2,771)	0	(6,003)	0
Net income (loss) attributable to BeyondSpring Inc.	$ (1,806)	$ (4,031)	$ 2,671	$ (7,262)
Continuing operations (in dollars per share)	$ (0.04)	$ (0.07)	$ (0.11)	$ (0.12)
Income (Loss) from Continuing Operations, Per Diluted Share (in dollars per share)	(0.07)	(0.04)	(0.12)	(0.11)
Discontinued operations (in dollars per share)	0	(0.03)	0.18	(0.07)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share (in dollars per share)	(0.03)	0	(0.07)	0.18
Basic and diluted earnings (loss) per share (in dollars per share)	(0.04)	(0.1)	0.07	(0.19)
Earnings Per Share, Diluted (in dollars per share)	$ (0.1)	$ (0.04)	$ (0.19)	$ 0.07
Weighted-average shares outstanding
Basic and diluted (in shares)	40,316,320	39,280,607	40,316,320	39,154,885
Other comprehensive loss, net of tax of nil:
Comprehensive loss	$ (5,019)	$ (3,927)	$ (4,007)	$ (6,801)
Comprehensive income (loss) attributable to BeyondSpring Inc.	(2,027)	(3,928)	2,354	(6,898)
Continuing Operations [Member]
Other comprehensive loss, net of tax of nil:
Foreign currency translation adjustment (loss) gain	(343)	165	(494)	587
Less: Comprehensive loss attributable to noncontrolling interests	(194)	1	(324)	97
Discontinued Operations [Member]
Other comprehensive loss, net of tax of nil:
Foreign currency translation adjustment (loss) gain	(27)	(3)	(34)	(11)
Less: Comprehensive loss attributable to noncontrolling interests	$ (2,798)	$ 0	$ (6,037)	$ 0