Summary of significant accounting policies (Details 2) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Noncontrolling interests	$ 850,152	$ 244,228
Infobird Guiyang [Member]
Noncontrolling interests	(73,283)	245,009
Infobird Anhui [Member]
Noncontrolling interests	(12)	(781)
Shanghai Qishuo [Member]
Noncontrolling interests	$ 923,447

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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+ Details