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General and Basis of Presentation - Organization (Details)
Nov. 12, 2020
Sep. 30, 2021
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Stockholders' equity note, stock split, conversion ratio 0.794  
Telos ID, Teloworks and Telos APAC    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Noncontrolling interest, ownership percentage by parent   100.00%