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Note 8 - Income Per Share - Computation Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Net income (loss) before allocation of earnings to participating securities	$ (1,800)	$ 44	$ (1,446)	$ 2,673
Less: Earnings allocated to participating securities				33
Net income (loss)	$ (1,800)	$ 44	$ (1,446)	$ 2,640
Weighted average number of common shares outstanding - basic (in shares)	14,618,582	15,646,014	14,600,578	15,603,909
Dilutive effect of share-based awards: (in shares)		225,260		182,030
Weighted average number of common shares outstanding - dilutive (in shares)	14,618,582	15,871,274	14,600,578	15,785,939
Basic income (loss) per common share attributable to Build-A-Bear Workshop, Inc. stockholders (in dollars per share)	$ (0.12)	$ 0	$ (0.10)	$ 0.17
Diluted income (loss) per common share attributable to Build-A-Bear Workshop, Inc. stockholders (in dollars per share)	$ (0.12)	$ 0	$ (0.10)	$ 0.17

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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