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Jones [Member] Richard H. 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Year One And Two Unbilled receivables not billable at balance sheet date amount expected to be collected within year one and two. 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Consulting Consulting [Member] Consulting [Member] Assets and liabilities measured at fair value on a recurring basis Fair Value Measurement, Policy [Policy Text Block] Total current liabilities Liabilities, Current Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Litigation Status [Axis] Litigation Status [Axis] Cloud hosting Accrued Cloud Hosting, Current Accrued Cloud Hosting, Current Individual: Individual [Axis] Dividend payments to stockholders Payments of Ordinary Dividends, Common Stock Other current assets Other current assets Other Assets, Current Research and development Research and Development Expense [Member] Additional paid-in capital Additional Paid in Capital, Common Stock Marketing and sales program Accrued Marketing Costs, Current Pegasystems v. Appian Defamation Litigation Pegasystems v. Appian Defamation Litigation [Member] Pegasystems v. 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Pegasystems Inc. & Youyong Zou Appian Corp. v. Pegasystems Inc. & Youyong Zou [Member] Appian Corp. v. Pegasystems Inc. & Youyong Zou Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Number of operating segments Number of Operating Segments (Accretion) of investments Accretion (Amortization) of Discounts and Premiums, Investments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Repurchases of convertible senior notes Repayments of Convertible Debt Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Issuance of common stock for stock compensation plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Outstanding letters of credit Letters of Credit Outstanding, Amount Schedule of Restructuring Activities and Accrued Employee Severance and Related Benefits Restructuring and Related Costs [Table Text Block] Schedule of Impairment of Deferred Commissions Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Issuance of common stock under the employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Total percentage of unbilled receivables Unbilled Receivables Current And Non Current Percentage Unbilled receivables current and non current percentage. Other current assets Other Assets, Current [Abstract] Other Assets, Current Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Name Trading Arrangement, Individual Name Equity Award [Domain] Award Type [Domain] 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Equity Awards Adjustments Equity Awards Adjustments [Member] Other non-cash Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Schedule of Stock-based Compensation Expense Grants Share-Based Payment Arrangement, Activity [Table Text Block] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Revenue recognized during the period that was included in deferred revenue Contract with Customer, Liability, Revenue Recognized MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Cash disbursements Payments for Restructuring Restricted cash included in other long-term assets Restricted cash Restricted Cash, Noncurrent Restructuring Type [Axis] Restructuring Type [Axis] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Unbilled revenue total Unbilled Revenue Total Unbilled Revenue Total Change in operating assets and liabilities, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital Revenue Revenues [Abstract] Schedule of Long-Lived Assets by Geographical Areas [Table] Schedule of Long-Lived Assets by Geographical Areas [Table] Schedule of Long-Lived Assets by Geographical Areas [Table] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Cost of revenue Cost Of Revenue [Member] Cost Of Revenue. 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