Accounts Receivable, Net (Tables)

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Schedule of Components of Accounts Receivable

The components of accounts receivable, net are as follows (in thousands):

	September 30, 2021		December 31, 2020
Accounts receivable	$	94,807	$	89,502
Allowance for credit losses	(3,158)		(4,696)
Allowance for product returns	(1,025)		(1,480)
Accounts receivable, net	$	90,624	$	83,326

Schedule of Changes in Allowance for Credit Losses for Accounts Receivable

The changes in our allowance for credit losses for accounts receivable are as follows (in thousands):

	Three Months Ended September 30, 2021				Three Months Ended September 30, 2020				Nine Months Ended September 30, 2021				Nine Months Ended September 30, 2020
	Alarm.com and Certain Subsidiaries		All Other Subsidiaries		Alarm.com and Certain Subsidiaries		All Other Subsidiaries		Alarm.com and Certain Subsidiaries		All Other Subsidiaries		Alarm.com and Certain Subsidiaries		All Other Subsidiaries
Beginning of period balance	$	(3,443)	$	(131)	$	(3,550)	$	(238)	$	(4,442)	$	(254)	$	(2,500)	$	(84)
Impact of adopting Topic 326	—		—		—		—		—		—		(212)		(155)
Recovery of / (provision for) expected credit losses	415		(27)		1,146		56		268		(30)		195		42
Write-offs	25		3		170		16		1,171		129		283		31
End of period balance	$	(3,003)	$	(155)	$	(2,234)	$	(166)	$	(3,003)	$	(155)	$	(2,234)	$	(166)

The changes in our allowance for credit losses for notes receivable are as follows (in thousands):

	Three Months Ended September 30, 2021				Three Months Ended September 30, 2020				Nine Months Ended September 30, 2021				Nine Months Ended September 30, 2020
	Loan Receivables		Hardware Financing Receivables		Loan Receivables		Hardware Financing Receivables		Loan Receivables		Hardware Financing Receivables		Loan Receivables		Hardware Financing Receivables
Beginning of period balance	$	(74)	$	(4)	$	(46)	$	(37)	$	(73)	$	(16)	$	—	$	(16)
Impact of adopting Topic 326	—		—		—		—		—		—		(434)		(15)
(Provision for) / recovery of expected credit losses	(3)		2		(20)		6		(4)		14		368		—
Write-offs	—		—		1		—		—		—		1		—
End of period balance	$	(77)	$	(2)	$	(65)	$	(31)	$	(77)	$	(2)	$	(65)	$	(31)