Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2024
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 for the fiscal year ended December 31, 2023 (the “2023 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.
Cash and Cash Equivalents and Cash Held on Behalf of Customers	Cash and Cash Equivalents and Cash Held on Behalf of Customers The Company maintained bank balances that, at times, exceeded the federally insured limit during the three months ended March 31, 2024. 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 Investments The Company did not record any material gains or losses on these securities during the three months ended March 31, 2024. The estimated fair value of these securities approximated their carrying value as of March 31, 2024 and December 31, 2023.
Other assets	Other Assets Other assets include deferred implementation costs of $8.5 million and $8.8 million and deferred commissions of $3.1 million and $2.6 million at March 31, 2024 and December 31, 2023, respectively. Amortization of deferred implementation costs were $1.5 million and $1.0 million for the three months ended March 31, 2024 and 2023, respectively. Amortization of deferred commissions were $0.4 million and $0.2 million for the three months ended March 31, 2024 and 2023, 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 Liabilities Other long-term liabilities include amounts owed to employees that participate in the Company’s deferred compensation plan. Amounts owed to employees participating in the deferred compensation plan were $1.2 million and $1.4 million at March 31, 2024 and December 31, 2023, respectively.
Operating Expenses Presentation Changes	Operating Expenses Presentation Changes Beginning with the 2023 Annual Report, we have retroactively split our historical "Selling, general and administrative" financial statement line item ("FSLI"), presented in the condensed consolidated statements of operations under "Operating expenses" into two FSLIs, "Sales and marketing" and "General and administrative", to provide clearer insight into these operationally and economically different operating expenses. This split did not change our total historical operating expenses previously reported.
Related Party Transactions	Related Party Transactions During the three months ended March 31, 2023, Ronald Shaich, the sole member of Act III Management LLC ("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 March 31, 2024 and December 31, 2023, the Company had zero accounts payable owed to Act III Management. During the three months ended March 31, 2024 and 2023, the Company paid Act III Management zero and $0.1 million, respectively, for services performed under the strategic advisor agreement.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements There were no recent accounting pronouncements or changes in accounting pronouncements during the three months ended March 31, 2024 that are of significance or potential significance to the Company.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

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 for the fiscal year ended December 31, 2023 (the “2023 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.

Cash and Cash Equivalents and Cash Held on Behalf of Customers

The Company maintained bank balances that, at times, exceeded the federally insured limit during the three months ended March 31, 2024. 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

The Company did not record any material gains or losses on these securities during the three months ended March 31, 2024. The estimated fair value of these securities approximated their carrying value as of March 31, 2024 and December 31, 2023.

Other assets

Other Assets

Other assets include deferred implementation costs of $8.5 million and $8.8 million and deferred commissions of $3.1 million and $2.6 million at March 31, 2024 and December 31, 2023, respectively. Amortization of deferred implementation costs were $1.5 million and $1.0 million for the three months ended March 31, 2024 and 2023, respectively. Amortization of deferred commissions were $0.4 million and $0.2 million for the three months ended March 31, 2024 and 2023, 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 liabilities include amounts owed to employees that participate in the Company’s deferred compensation plan. Amounts owed to employees participating in the deferred compensation plan were $1.2 million and $1.4 million at March 31, 2024 and December 31, 2023, respectively.

Operating Expenses Presentation Changes

Beginning with the 2023 Annual Report, we have retroactively split our historical "Selling, general and administrative" financial statement line item ("FSLI"), presented in the condensed consolidated statements of operations under "Operating expenses" into two FSLIs, "Sales and marketing" and "General and administrative", to provide clearer insight into these operationally and economically different operating expenses. This split did not change our total historical operating expenses previously reported.

Related Party Transactions

During the three months ended March 31, 2023, Ronald Shaich, the sole member of Act III Management LLC ("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 March 31, 2024 and December 31, 2023, the Company had zero accounts payable owed to Act III Management. During the three months ended March 31, 2024 and 2023, the Company paid Act III Management zero and $0.1 million, respectively, for services performed under the strategic advisor agreement.

Recently Adopted Accounting Pronouncements

There were no recent accounting pronouncements or changes in accounting pronouncements during the three months ended March 31, 2024 that are of significance or potential significance to the Company.