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Debt, Commitments and Contingencies - Legal Proceedings (Details) - Pending Litigation
1 Months Ended
Jul. 28, 2021
numberOfPatents
Jul. 22, 2021
numberOfPatents
Jun. 25, 2021
numberOfPatents
Apr. 30, 2021
numberOfPatents
Feb. 25, 2021
numberOfPatents
May 26, 2020
numberOfPatents
Nov. 11, 2019
numberOfPatents
Oct. 22, 2019
numberOfPatents
Jul. 24, 2019
numberOfPatents
Jul. 14, 2019
claim
Nov. 05, 2018
claim
Jun. 26, 2017
numberOfPatents
Aug. 19, 2016
numberOfPatents
Jun. 02, 2015
numberOfPatents
Jul. 31, 2018
numberOfPatents
Sep. 30, 2017
numberOfPatents
May 31, 2017
numberOfPatents
Mar. 31, 2017
numberOfPatents
Vivint, Inc. vs. Alarm.com Holdings, Inc                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed upon by the company                 2     4 5 6     3 2
Number of patents invalidated all challenged claims                             2      
Number of patents under reexamination                               2    
Number of patents found to be unpatentable | claim                   1 9              
Number of patents allegedly infringed by elements in solution                           1        
EcoFactor, Inc. vs. Alarm.com Holdings, Inc.                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed upon by the company           4 3 3                    
Number of patents under reexamination           1                        
Causam Enterprises, Inc vs Alarm.com Holdings, Inc | Subsequent Event                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed upon by the company   4                                
Causam Enterprises, Inc vs Alarm.com Holdings, Inc and EnergyHub, Inc | Subsequent Event                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed upon by the company 4                                  
Vivint, Inc vs ADT LLC                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed, inequitable conduct       1                            
Vivint, Inc vs ADT LLC | Minimum                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed upon by the company     5   1                          
Vivint, Inc vs ADT LLC | Maximum                                    
Loss Contingencies [Line Items]                                    
Number of patents allegedly infringed upon by the company     6   6