Selling and marketing expenses (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Selling and marketing expenses

Summary of selling and marketing expenses

	Six months ended June 30,		Three months ended June 30,
	2021	2020	2021	2020
Advertising costs	(154,634)	(72,976)	(90,190)	(30,785)
Employee benefits expenses	(838)	(377)	(555)	(188)
	(155,472)	(73,353)	(90,745)	(30,973)

	2020	2019
Advertising costs	(164,929)	(81,814)
Employee benefits expenses	(827)	(366)
	(165,756)	(82,180)