| Document and Entity Information | 12 Months Ended |
| Dec. 31, 2022 | |
| Cover [Abstract] | |
| Document Type | DEF 14A |
| Amendment Flag | false |
| Entity Registrant Name | PAR TECHNOLOGY CORPORATION |
| Entity Central Index Key | 0000708821 |
| Pay vs Performance Disclosure - USD ($) | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Pay vs Performance Disclosure [Table] | |||
| Pay vs Performance [Table Text Block] | Pay Versus Performance As required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, and Item 402(v) of Regulation S-K of the Exchange Act, we are providing the following information about the relationship between executive “compensation actually paid” and certain financial performance of the Company. For further information concerning the Company’s pay for performance philosophy and how the Company aligns executive compensation with the Company’s performance, refer to Compensation Discussion and Analysis above. Value of Initial Fixed $100 Investment Based on: Year Summary Compensation Table Total for the PEO 1 Compensation Actually Paid to the PEO 2 Average Summary Compensation Table Total for the Non-PEO NEOs 3 Average Compensation Actually Paid to the Non-PEO NEOs 4 Total Shareholder Return 5 Peer Group Total Shareholder Return 6 Net Income 7 Non-GAAP Adjusted EBITDA 8 2022 $2,155,099 ($ 7,771,695 $1,347,796 $ 649,506 $ 84.81 $103.62 ($69,319) ($18,845) 2021 $1,124,454 $ 1,928,070 $ 516,345 $1,617,502 $171.67 $162.50 ($75,799) ($17,793) 2020 $8,220,228 $55,524,053 $ 447,781 $1,024,510 $204.26 $142.50 ($36,562) ($12,453) 1. The dollar amounts reported in this column are the amounts reported for Savneet Singh (the Company's Chief Executive Officer) for each of the corresponding years in the “Total” column in our Summary Compensation Table. 2. The dollar amounts reported in this column represent the amount of “compensation actually paid” to Mr. Singh, as computed in accordance with Item 402(v) of Regulation S-K and do not reflect the total compensation actually realized or received by Mr. Singh. Equity values are calculated in accordance with FASB ASC Topic 718. 3. The dollar amounts reported in this column represent the average of the amounts reported for the Company's named executive officers (NEOs) as a group (excluding Mr. Singh) are the amounts reported in the “Total” column of the Summary Compensation Table in each applicable year. The names of each of these NEOs (excluding Mr. Singh) included for these purposes in each applicable year are as follows: (i) for 2022, Bryan A. Menar, Cathy King, Raju Malhotra, and Michael Nelson (as reported in this Proxy Statement); (ii) for 2021, Bryan A. Menar, Raju Malhotra, Michael Nelson, and Matthew R. Cicchinelli (as reported in the Company's 2022 proxy statement); and (iii) for 2020, Bryan A. Menar and Matthew R. Cicchinelli (as reported in the Company's 2021 proxy statement). 4. The dollar amounts reported in this column represent the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Singh), as computed in accordance with Item 402(v) of Regulation S-K, and do not reflect the total compensation actually realized or received by these individuals. In accordance with the requirements of Item 402(v) of Regulation S-K, these amounts reflect “Total Compensation” as set forth in the Summary Compensation Table for each year, as adjusted as shown below. Equity values are calculated in accordance with FASB ASC Topic 718. Year Name of PEO Reported Summary Compensation Table Total for PEO [Less] Reported Value of Equity Awards (a) [Plus] Fair Value at Fiscal Year- End of Outstanding and Unvested Option Awards and Stock Awards Granted in Fiscal Year [Plus] Change in Fair Value of Outstanding and Unvested Option Awards and Stock Awards Granted in Prior Fiscal Years [Plus] Fair Value at Vesting of Option Awards and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year [Plus] Change in Fair Value as of vesting Date of Option Awards and Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year [Less] Fair Value as of Prior Fiscal Year- End of Option Awards and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year [Equals] Compensation Actually Paid 2022 PEO $2,155,099 $ 766,800 $ 521,400 ($3,026,018) $ 0 ($5,299,345) ($1,356,031) ($ 7,771,695 2022 Non-PEO NEOs $1,347,796 $ 637,997 $ 433,818 ($ 336,186) $ 0 ($ 122,295) ($ 35,629) $ 649,506 2021 PEO $1,124,454 $ 0 $ 0 ($4,464,854) $ 0 $5,896,434 ($ 627,963) $ 1,928,070 2021 Non-PEO NEOs $ 516,345 $ 136,276 $ 864,037 ($ 11,620) $427,013 ($ 8,342) ($ 33,655) $ 1,617,502 2020 PEO $8,220,228 $7,225,295 $53,244,073 $1,709,419 $538,568 ($ 655,570) ($ 307,369) $55,524,053 2020 Non-PEO NEOs $ 447,781 $ 37,484 $ 49,981 $ 407,798 $ 0 $ 170,298 ($ 13,864) $ 1,024,510 5. Cumulative TSR is calculated by dividing (a) the sum of (i) the cumulative amount of dividends on our common stock for the measurement period (if any), assuming dividend reinvestment, and (ii) the difference between the Company’s share price at the end and the beginning of the measurement period by (b) the Company’s share price at the beginning of the measurement period. 6. Represents the weighted peer group TSR, weighted according to the respective companies’ stock market capitalization at the beginning of each period for which a return is indicated. The peer group used for this purpose is the Russell 2000 Technology Index. 7. The dollar amounts reported represent the amount of net income reflected in the Company’s audited financial statements for the applicable year (in thousands). 8. The dollar amounts reported represent non-GAAP Adjusted EBITDA, which is the net loss before income taxes, interest expense and depreciation and amortization of the Company’s Restaurant/Retail segment, as adjusted to exclude certain non-cash and non-recurring charges, including stock-based compensation, acquisition expenses, certain pending litigation expenses and other non-recurring charges that may not be indicative of our financial performance. | ||
| Company Selected Measure Name | Non-GAAP Adjusted EBITDA | ||
| Named Executive Officers, Footnote [Text Block] | 3. The dollar amounts reported in this column represent the average of the amounts reported for the Company's named executive officers (NEOs) as a group (excluding Mr. Singh) are the amounts reported in the “Total” column of the Summary Compensation Table in each applicable year. The names of each of these NEOs (excluding Mr. Singh) included for these purposes in each applicable year are as follows: (i) for 2022, Bryan A. Menar, Cathy King, Raju Malhotra, and Michael Nelson (as reported in this Proxy Statement); (ii) for 2021, Bryan A. Menar, Raju Malhotra, Michael Nelson, and Matthew R. Cicchinelli (as reported in the Company's 2022 proxy statement); and (iii) for 2020, Bryan A. Menar and Matthew R. Cicchinelli (as reported in the Company's 2021 proxy statement). | ||
| Peer Group Issuers, Footnote [Text Block] | 6. Represents the weighted peer group TSR, weighted according to the respective companies’ stock market capitalization at the beginning of each period for which a return is indicated. The peer group used for this purpose is the Russell 2000 Technology Index. | ||
| PEO Total Compensation Amount | $ 2,155,099 | $ 1,124,454 | $ 8,220,228 |
| PEO Actually Paid Compensation Amount | $ (7,771,695) | 1,928,070 | 55,524,053 |
| Adjustment To PEO Compensation, Footnote [Text Block] | 4. The dollar amounts reported in this column represent the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Singh), as computed in accordance with Item 402(v) of Regulation S-K, and do not reflect the total compensation actually realized or received by these individuals. In accordance with the requirements of Item 402(v) of Regulation S-K, these amounts reflect “Total Compensation” as set forth in the Summary Compensation Table for each year, as adjusted as shown below. Equity values are calculated in accordance with FASB ASC Topic 718. Year Name of PEO Reported Summary Compensation Table Total for PEO [Less] Reported Value of Equity Awards (a) [Plus] Fair Value at Fiscal Year- End of Outstanding and Unvested Option Awards and Stock Awards Granted in Fiscal Year [Plus] Change in Fair Value of Outstanding and Unvested Option Awards and Stock Awards Granted in Prior Fiscal Years [Plus] Fair Value at Vesting of Option Awards and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year [Plus] Change in Fair Value as of vesting Date of Option Awards and Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year [Less] Fair Value as of Prior Fiscal Year- End of Option Awards and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year [Equals] Compensation Actually Paid 2022 PEO $2,155,099 $ 766,800 $ 521,400 ($3,026,018) $ 0 ($5,299,345) ($1,356,031) ($ 7,771,695 2022 Non-PEO NEOs $1,347,796 $ 637,997 $ 433,818 ($ 336,186) $ 0 ($ 122,295) ($ 35,629) $ 649,506 2021 PEO $1,124,454 $ 0 $ 0 ($4,464,854) $ 0 $5,896,434 ($ 627,963) $ 1,928,070 2021 Non-PEO NEOs $ 516,345 $ 136,276 $ 864,037 ($ 11,620) $427,013 ($ 8,342) ($ 33,655) $ 1,617,502 2020 PEO $8,220,228 $7,225,295 $53,244,073 $1,709,419 $538,568 ($ 655,570) ($ 307,369) $55,524,053 2020 Non-PEO NEOs $ 447,781 $ 37,484 $ 49,981 $ 407,798 $ 0 $ 170,298 ($ 13,864) $ 1,024,510 | ||
| Non-PEO NEO Average Total Compensation Amount | $ 1,347,796 | 516,345 | 447,781 |
| Non-PEO NEO Average Compensation Actually Paid Amount | $ 649,506 | 1,617,502 | 1,024,510 |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | 4. The dollar amounts reported in this column represent the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Singh), as computed in accordance with Item 402(v) of Regulation S-K, and do not reflect the total compensation actually realized or received by these individuals. In accordance with the requirements of Item 402(v) of Regulation S-K, these amounts reflect “Total Compensation” as set forth in the Summary Compensation Table for each year, as adjusted as shown below. Equity values are calculated in accordance with FASB ASC Topic 718. Year Name of PEO Reported Summary Compensation Table Total for PEO [Less] Reported Value of Equity Awards (a) [Plus] Fair Value at Fiscal Year- End of Outstanding and Unvested Option Awards and Stock Awards Granted in Fiscal Year [Plus] Change in Fair Value of Outstanding and Unvested Option Awards and Stock Awards Granted in Prior Fiscal Years [Plus] Fair Value at Vesting of Option Awards and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year [Plus] Change in Fair Value as of vesting Date of Option Awards and Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year [Less] Fair Value as of Prior Fiscal Year- End of Option Awards and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year [Equals] Compensation Actually Paid 2022 PEO $2,155,099 $ 766,800 $ 521,400 ($3,026,018) $ 0 ($5,299,345) ($1,356,031) ($ 7,771,695 2022 Non-PEO NEOs $1,347,796 $ 637,997 $ 433,818 ($ 336,186) $ 0 ($ 122,295) ($ 35,629) $ 649,506 2021 PEO $1,124,454 $ 0 $ 0 ($4,464,854) $ 0 $5,896,434 ($ 627,963) $ 1,928,070 2021 Non-PEO NEOs $ 516,345 $ 136,276 $ 864,037 ($ 11,620) $427,013 ($ 8,342) ($ 33,655) $ 1,617,502 2020 PEO $8,220,228 $7,225,295 $53,244,073 $1,709,419 $538,568 ($ 655,570) ($ 307,369) $55,524,053 2020 Non-PEO NEOs $ 447,781 $ 37,484 $ 49,981 $ 407,798 $ 0 $ 170,298 ($ 13,864) $ 1,024,510 | ||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | |||
| Compensation Actually Paid vs. Net Income [Text Block] | |||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | |||
| Total Shareholder Return Vs Peer Group [Text Block] | |||
| Tabular List [Table Text Block] | Most Important Performance Measures As described in greater detail in the Compensation Discussion and Analysis, the Company’s executive compensation programs reflect a variable pay-for-performance philosophy. The metrics that the Company uses for both long-term and short-term incentive awards are selected based on an objective to incentivizing our NEOs to increase the value of our enterprise for our shareholders. The most important financial performance measures used by the Company to link executive compensation actually paid to the Company’s NEOs, for the most recently completed fiscal year, to the Company’s performance are as follows: Most Important Financial Performance Measures Non-GAAP Adjusted EBITDA Annual Recurring Revenue (ARR) Government Net Income Before Taxes | ||
| Total Shareholder Return Amount | $ 84.81 | 171.67 | 204.26 |
| Peer Group Total Shareholder Return Amount | 103.62 | 162.5 | 142.5 |
| Net Income (Loss) | $ (69,319,000) | $ (75,799,000) | $ (36,562,000) |
| Company Selected Measure Amount | (18,845,000) | (17,793,000) | (12,453,000) |
| PEO Name | Savneet Singh | Savneet Singh | Savneet Singh |
| Additional 402(v) Disclosure [Text Block] | 2. The dollar amounts reported in this column represent the amount of “compensation actually paid” to Mr. Singh, as computed in accordance with Item 402(v) of Regulation S-K and do not reflect the total compensation actually realized or received by Mr. Singh. Equity values are calculated in accordance with FASB ASC Topic 718. | ||
| Measure [Axis]: 1 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Non-GAAP Adjusted EBITDA | ||
| Non-GAAP Measure Description [Text Block] | 8. The dollar amounts reported represent non-GAAP Adjusted EBITDA, which is the net loss before income taxes, interest expense and depreciation and amortization of the Company’s Restaurant/Retail segment, as adjusted to exclude certain non-cash and non-recurring charges, including stock-based compensation, acquisition expenses, certain pending litigation expenses and other non-recurring charges that may not be indicative of our financial performance. | ||
| Measure [Axis]: 2 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Annual Recurring Revenue (ARR) | ||
| Measure [Axis]: 3 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Government Net Income Before Taxes | ||
| PEO [Member] | Value of Equity Awards [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ (766,800) | $ 0 | $ (7,225,295) |
| PEO [Member] | Fair Value at Fiscal Year-End of Outstanding and Unvested Option Awards and Stock Awards Granted in Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 521,400 | 0 | 53,244,073 |
| PEO [Member] | Change in Fair Value of Outstanding and Unvested Option Awards and Stock Awards Granted in Prior Fiscal Years [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (3,026,018) | (4,464,854) | 1,709,419 |
| PEO [Member] | Fair Value at Vesting of Option Awards and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 538,568 |
| PEO [Member] | Change in Fair Value as of Vesting Date of Option Awards and Stock Awards Granted in Prior Fiscal Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (5,299,345) | 5,896,434 | (655,570) |
| PEO [Member] | Fair Value as of Prior Fiscal Year-End of Option Awards and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (1,356,031) | (627,963) | (307,369) |
| Non-PEO NEO [Member] | Value of Equity Awards [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (637,997) | (136,276) | (37,484) |
| Non-PEO NEO [Member] | Fair Value at Fiscal Year-End of Outstanding and Unvested Option Awards and Stock Awards Granted in Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 433,818 | 864,037 | 49,981 |
| Non-PEO NEO [Member] | Change in Fair Value of Outstanding and Unvested Option Awards and Stock Awards Granted in Prior Fiscal Years [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (336,186) | (11,620) | 407,798 |
| Non-PEO NEO [Member] | Fair Value at Vesting of Option Awards and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 427,013 | 0 |
| Non-PEO NEO [Member] | Change in Fair Value as of Vesting Date of Option Awards and Stock Awards Granted in Prior Fiscal Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (122,295) | (8,342) | 170,298 |
| Non-PEO NEO [Member] | Fair Value as of Prior Fiscal Year-End of Option Awards and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ (35,629) | $ (33,655) | $ (13,864) |
