Other current liabilities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	May 29, 2021	Dec. 14, 2020	Sep. 30, 2020
Other Liabilities [Line Items]
Contingent consideration for acquisition of businesses	$ 2,979			$ 0
Other Current Liabilities
Other Liabilities [Line Items]
Due to related parties	1,100
Daxx
Other Liabilities [Line Items]
Contingent consideration for acquisition of businesses			$ 1,900
Daxx | Other Income (Expense)
Other Liabilities [Line Items]
Change in contingent consideration	$ 400
Tactic Knowledge Inc.
Other Liabilities [Line Items]
Contingent consideration for acquisition of businesses		$ 3,400