Related Party Transactions - Summary of Related Party Transactions Outstanding (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Due to related parties	$ 1,122	$ 1,615
Interfusion B.V. [Member] \| Related Party Loans [Member]
Related Party Transaction [Line Items]
Due to related parties	0	985
T-Fone B.V. [Member] \| Related Party Loans [Member]
Related Party Transaction [Line Items]
Due to related parties	$ 0	$ 630

Portion of the carrying amount as of the balance sheet date of obligations due all related parties that is payable after one year or beyond the normal operating cycle if longer.

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+ Details