Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings Hamot et al. v. Telos Corporation As previously reported in Note 8 of the Form 10-Q for the quarter ended June 30, 2021 filed on August 16, 2021, beginning on August 2, 2007, Messrs. Seth W. Hamot (“Hamot”) and Andrew R. Siegel (“Siegel”), principals of Costa Brava Partnership III, L.P. (“Costa Brava”), were involved in litigation against the Company as Plaintiffs and Counter-defendants in the Circuit Court for Baltimore City, Maryland (the “Circuit Court”). Mr. Siegel was a Class D Director of the Company until the closing of the IPO on November 23, 2020, and Mr. Hamot was a Class D Director of the Company until his resignation on March 9, 2018. Trial on Hamot and Siegel’s claims and the Company’s counterclaims took place in July through September 2013, and the Court subsequently issued decisions on the various claims by way of memorandum opinions and orders dated September 11, 2017. Among other rulings, the Court found Hamot and Siegel liable for the intentional tort of tortious interference with the Company’s contractual relationship with one of its auditors and entered a monetary judgment in favor of the Company and against Hamot and Siegel. Hamot (and later, his Estate) and Siegel on multiple occasions during this litigation sought to be indemnified or to be awarded advancement of various attorney’s fees and expenses incurred by them in this litigation. On January 28, 2021, Plaintiffs filed a Motion for Leave to File Amended Motion for Indemnification of Legal Fees and Expenses (“Amended Motion”). The Amended Motion demanded that the Company indemnify the Plaintiffs for legal fees and expenses incurred in the sum of $2,540,000 plus the costs incurred in obtaining indemnification, and the Company opposed the motions. On May 5, 2021, the Company, Plaintiffs and Costa Brava entered into a settlement agreement, which included a mutual general release, fully and finally settling the indemnification claim in exchange for a $1.0 million payment, which sum was paid on May 12, 2021 as reported under other income (expense) in our condensed consolidated statements of operations. This settlement concluded all open matters or disputes between the Company and Messrs. Hamot (or his estate) and Siegel, as well as the previously disposed of claims of Costa Brava. Other Litigation The Company may be a party to litigation from time to time arising in the ordinary course of business. In the opinion of management, while the results of such litigation cannot be predicted with any reasonable degree of certainty, the final outcome of such known matters will not, based upon all available information, have a material adverse effect on the Company's condensed consolidated financial position, results of operations or cash flows. Other - Government Contracts As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties, and compensatory and damages. We believe the outcome of such ongoing government audits and investigations will not have a material impact on our results of operations, financial condition or cash flows. In the performance of our contracts, we routinely request contract modifications that require additional funding from the customer. Most often, these requests are due to customer-directed changes in the scope of work. While we are entitle to recovery of these costs under our contracts, the administrative process with our customer may be protracted. Based on the circumstances, we periodically file requests for equitable adjustments ("REAs") that are sometimes converted into claims. In some cases, these requests are disputed by our customers. We believe our outstanding modifications, REAs and other claims will be resolved without material impact to our result of operations, financial conditions or cash flows.