Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying financial statements of PAR Technology Corporation and its consolidated subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial statements and the instructions to Form 10-Q and Regulation S-X pertaining to interim financial statements as promulgated by the SEC. In the opinion of management, the Company's financial statements include all normal and recurring adjustments necessary in order to make the financial statements not misleading and to provide a fair presentation of the Company's financial results for the interim period included in this Quarterly Report. Interim results are not necessarily indicative of results for the full year or any future periods. The information included in this Quarterly Report should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K/A for the fiscal year ended December 31, 2022 (the “2022 Annual Report”).
Use of Estimates	Use of Estimates The preparation of the financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to these estimates and assumptions include revenue recognition, stock-based compensation, the recognition and measurement of assets acquired and liabilities assumed in business combinations at fair value, the carrying amount of property, plant, and equipment including right-to-use assets and liabilities, identifiable intangible assets and goodwill, valuation allowances for receivables, valuation of excess and obsolete inventories, and measurement of contingent consideration at fair value. Actual results could differ from those estimates.
Contingent Consideration	Contingent ConsiderationThe acquisition date fair value of contingent consideration associated with the acquisition of MENU Technologies AG ("MENU") in July 2022 (the "MENU Acquisition") was determined using Monte-Carlo simulation valuation techniques, with significant inputs that are not observable in the market and thus are classified in Level 3 of the fair value hierarchy as defined in ASC Topic 820, Fair Value Measurement. The simulation uses probability distribution for each significant input to produce hundreds or thousands of possible outcomes and the results are analyzed to determine probabilities of different outcomes occurring. Significant increases or decreases to these inputs in isolation would result in a significantly higher or lower liability. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and amount paid will be recorded in earnings. The amount paid that is less than or equal to the liability on the acquisition date is reflected as cash used in financing activities in the Company's condensed consolidated statements of cash flows. Any amount paid in excess of the liability on the acquisition date is reflected as cash used in operating activities.
Cash and Cash Equivalents and Cash Held on Behalf of Customers	Cash and Cash Equivalents and Cash Held on Behalf of CustomersThe Company maintained bank balances that, at times, exceeded the federally insured limit during the nine months ended September 30, 2023. The Company has not experienced losses relating to these deposits and management does not believe that the Company is exposed to any significant credit risk with respect to these amounts.
Short-Term Investments	Short-Term InvestmentsThe Company did not record any material gains or losses on these securities during the nine months ended September 30, 2023. The estimated fair value of these securities approximated their carrying value as of September 30, 2023 and December 31, 2022.
Other assets	Other Assets Other assets include deferred implementation costs of $8.5 million and $7.4 million at September 30, 2023 and December 31, 2022, respectively. Based on ASC Topic 340, Other Assets and Deferred Costs, we capitalize and amortize incremental costs of fulfilling a contract over the period we expect to derive benefits from the contract, which we have determined as the initial term of a contract. We periodically adjust the carrying value of deferred implementation costs to account for customers ceasing operations or otherwise discontinuing use of our subscription services. Amortization expense is included in "Costs of sales: Professional service" in the Company's condensed consolidated statements of operations. Amortization of deferred implementation costs were $1.2 million and $0.7 million for the three months ended September 30, 2023 and 2022, respectively. Amortization of deferred implementation costs were $3.2 million and $1.6 million for the nine months ended September 30, 2023 and 2022, respectively. Other assets also include the cash surrender value of life insurance related to the Company’s deferred compensation plan eligible to certain employees. The funded balance is reviewed on an annual basis.
Other Long-Term Liabilities	Other Long-Term LiabilitiesAs of December 31, 2022, other long-term liabilities include the contingent consideration liability recognized in conjunction with the MENU Acquisition (refer to “Contingent Consideration” above for additional information).
Related Party Transactions	Related Party Transactions During the nine months ended September 30, 2022, Act III Management LLC (“Act III Management”), a service company to the restaurant, hospitality, and entertainment industries, provided software development and restaurant technology consulting services to the Company pursuant to a master development agreement. Additionally, during the nine months ended September 30, 2023, Ronald Shaich, the sole member of Act III Management, served as a strategic advisor to the Company's board of directors pursuant to a strategic advisor agreement, which terminated on June 1, 2023. Keith Pascal, a director of the Company, is an employee of Act III Management and serves as its vice president and secretary. Mr. Pascal does not have an ownership interest in Act III Management. As of September 30, 2023 and December 31, 2022, the Company had zero accounts payable owed to Act III Management. During the three months ended September 30, 2023 and 2022, the Company paid Act III Management zero and $0.1 million, respectively, and during the nine months ended September 30, 2023 and 2022, the Company paid Act III Management $0.1 million and $0.6 million, respectively, for services performed under the master development and strategic advisor agreements.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements There were no recent accounting pronouncements or changes in accounting pronouncements during the nine months ended September 30, 2023 that are of significance or potential significance to the Company.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

The accompanying financial statements of PAR Technology Corporation and its consolidated subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial statements and the instructions to Form 10-Q and Regulation S-X pertaining to interim financial statements as promulgated by the SEC. In the opinion of management, the Company's financial statements include all normal and recurring adjustments necessary in order to make the financial statements not misleading and to provide a fair presentation of the Company's financial results for the interim period included in this Quarterly Report. Interim results are not necessarily indicative of results for the full year or any future periods. The information included in this Quarterly Report should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K/A for the fiscal year ended December 31, 2022 (the “2022 Annual Report”).

Use of Estimates

The preparation of the financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to these estimates and assumptions include revenue recognition, stock-based compensation, the recognition and measurement of assets acquired and liabilities assumed in business combinations at fair value, the carrying amount of property, plant, and equipment including right-to-use assets and

liabilities, identifiable intangible assets and goodwill, valuation allowances for receivables, valuation of excess and obsolete inventories, and measurement of contingent consideration at fair value. Actual results could differ from those estimates.

Contingent Consideration

Contingent ConsiderationThe acquisition date fair value of contingent consideration associated with the acquisition of MENU Technologies AG ("MENU") in July 2022 (the "MENU Acquisition") was determined using Monte-Carlo simulation valuation techniques, with significant inputs that are not observable in the market and thus are classified in Level 3 of the fair value hierarchy as defined in ASC Topic 820, Fair Value Measurement. The simulation uses probability distribution for each significant input to produce hundreds or thousands of possible outcomes and the results are analyzed to determine probabilities of different outcomes occurring. Significant increases or decreases to these inputs in isolation would result in a significantly higher or lower liability. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and amount paid will be recorded in earnings. The amount paid that is less than or equal to the liability on the acquisition date is reflected as cash used in financing activities in the Company's condensed consolidated statements of cash flows. Any amount paid in excess of the liability on the acquisition date is reflected as cash used in operating activities.

Cash and Cash Equivalents and Cash Held on Behalf of Customers

Cash and Cash Equivalents and Cash Held on Behalf of CustomersThe Company maintained bank balances that, at times, exceeded the federally insured limit during the nine months ended September 30, 2023. The Company has not experienced losses relating to these deposits and management does not believe that the Company is exposed to any significant credit risk with respect to these amounts.

Short-Term Investments

Short-Term InvestmentsThe Company did not record any material gains or losses on these securities during the nine months ended September 30, 2023. The estimated fair value of these securities approximated their carrying value as of September 30, 2023 and December 31, 2022.

Other assets

Other Assets

Other assets include deferred implementation costs of $8.5 million and $7.4 million at September 30, 2023 and December 31, 2022, respectively. Based on ASC Topic 340, Other Assets and Deferred Costs, we capitalize and amortize incremental costs of fulfilling a contract over the period we expect to derive benefits from the contract, which we have determined as the initial term of a contract. We periodically adjust the carrying value of deferred implementation costs to account for customers ceasing operations or otherwise discontinuing use of our subscription services. Amortization expense is included in "Costs of sales: Professional service" in the Company's condensed consolidated statements of operations. Amortization of deferred implementation costs were $1.2 million and $0.7 million for the three months ended September 30, 2023 and 2022, respectively. Amortization of deferred implementation costs were $3.2 million and $1.6 million for the nine months ended September 30, 2023 and 2022, respectively.

Other assets also include the cash surrender value of life insurance related to the Company’s deferred compensation plan eligible to certain employees. The funded balance is reviewed on an annual basis.

Other Long-Term Liabilities

Other Long-Term LiabilitiesAs of December 31, 2022, other long-term liabilities include the contingent consideration liability recognized in conjunction with the MENU Acquisition (refer to “Contingent Consideration” above for additional information).

Related Party Transactions

During the nine months ended September 30, 2022, Act III Management LLC (“Act III Management”), a service company to the restaurant, hospitality, and entertainment industries, provided software development and restaurant technology consulting services to the Company pursuant to a master development agreement.

Additionally, during the nine months ended September 30, 2023, Ronald Shaich, the sole member of Act III Management, served as a strategic advisor to the Company's board of directors pursuant to a strategic advisor agreement, which terminated on June 1, 2023. Keith Pascal, a director of the Company, is an employee of Act III Management and serves as its vice president and secretary. Mr. Pascal does not have an ownership interest in Act III Management.

As of September 30, 2023 and December 31, 2022, the Company had zero accounts payable owed to Act III Management. During the three months ended September 30, 2023 and 2022, the Company paid Act III Management zero and $0.1 million, respectively, and during the nine months ended September 30, 2023 and 2022, the Company paid Act III Management $0.1 million and $0.6 million, respectively, for services performed under the master development and strategic advisor agreements.

Recently Adopted Accounting Pronouncements

There were no recent accounting pronouncements or changes in accounting pronouncements during the nine months ended September 30, 2023 that are of significance or potential significance to the Company.