Debt, Commitments and Contingencies - Legal Proceedings (Details) $ in Thousands									1 Months Ended	3 Months Ended								12 Months Ended			36 Months Ended
	Jan. 04, 2023 patent	Mar. 22, 2022 patent	Jan. 10, 2022 patent	Oct. 29, 2021 patent	Jul. 28, 2021 patent	Jul. 22, 2021 patent	Feb. 25, 2021 patent	Jun. 02, 2015 patent	Oct. 31, 2019 patent	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) patent	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 patent
Loss Contingencies [Line Items]
Total revenue | $										$ (208,139)	$ (216,138)	$ (212,845)	$ (205,437)	$ (195,290)	$ (192,324)	$ (188,857)	$ (172,498)	$ (842,559)	$ (748,969)	$ (618,003)
Net income | $										(17,790)	$ (18,110)	$ (10,828)	$ (8,903)	$ (8,841)	$ (13,294)	$ (14,490)	$ (14,550)	(55,631)	(51,175)	(76,660)
SaaS and license revenue
Loss Contingencies [Line Items]
Total revenue | $																		$ (520,377)	$ (460,372)	$ (393,257)
Pending Litigation | SaaS and license revenue
Loss Contingencies [Line Items]
Total revenue | $										6,000
Net income | $										$ 6,000
Pending Litigation | Vivint, Inc. vs. Alarm.com Holdings, Inc
Loss Contingencies [Line Items]
Number of patents allegedly infringed								6
Number of patents found unpatentable																					5
Claims severed to move into a separate case				2
Number of patents allegedly infringed by elements in solution								1
Pending Litigation | Vivint, Inc. vs. Alarm.com Holdings, Inc | Subsequent Event
Loss Contingencies [Line Items]
Number of patents allegedly infringed	15
Pending Litigation | EcoFactor, Inc. vs. Alarm.com Holdings, Inc.
Loss Contingencies [Line Items]
Number of patents allegedly infringed			5						2
Number of patents under ex parte reexamination																		2
Number of patents under reexamination																		3
Pending Litigation | Causam Enterprises, Inc vs Alarm.com Holdings, Inc
Loss Contingencies [Line Items]
Number of patents allegedly infringed						4
Pending Litigation | Causam Enterprises, Inc vs Alarm.com Holdings, Inc and EnergyHub, Inc
Loss Contingencies [Line Items]
Number of patents allegedly infringed					4
Pending Litigation | Vivint, Inc vs ADT LLC
Loss Contingencies [Line Items]
Number of patents allegedly infringed		5
Patents under inter partes review		2
Pending Litigation | Vivint, Inc vs ADT LLC | Minimum
Loss Contingencies [Line Items]
Number of patents allegedly infringed							1