Accounts Receivable, Net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for / (recovery of) expected credit losses	$ 100	$ (900)	$ 150	$ 965
Reserve for product returns			1,129	1,000
Credit loss expense (reversal) for accounts and notes receivable	100	(900)	100	500
Distribution Partner Acquired By Third Party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write-offs			700
Hardware and other revenue
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reserve for product returns	$ 500	$ 700	$ 1,100	$ 1,000