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Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - CAPITALIZED SOFTWARE, NET link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - PROPERTY AND EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - SIGNIFICANT BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - FINANCING ARRANGEMENTS link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - STOCK INCENTIVE PLANS link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - EMPLOYEE BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - CAPITALIZED SOFTWARE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - SIGNIFICANT BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - FINANCING ARRANGEMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - STOCK INCENTIVE PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - NET LOSS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred Contract Acquisition Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Components of Bonus Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Total revenue by geographic area (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - CAPITALIZED SOFTWARE, NET - Capitalized Software, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - CAPITALIZED SOFTWARE, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - PROPERTY AND EQUIPMENT, NET - Schedule of Property And Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - PROPERTY AND EQUIPMENT, NET -Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - LEASES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - LEASES - Summary of Lease Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - LEASES - Summary of Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - LEASES - Cashflow Disclosures (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - LEASES - Lease Maturity Schedule (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - LEASES - Lease Maturity Schedule (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - SIGNIFICANT BALANCE SHEET COMPONENTS - Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - SIGNIFICANT BALANCE SHEET COMPONENTS - Accrued Expenses and Other Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - FINANCING ARRANGEMENTS - Amortizing term mortgage (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - FINANCING ARRANGEMENTS - 2021 Amended Term Loan (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - FINANCING ARRANGEMENTS - Monthly revolving line of credit (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - FINANCING ARRANGEMENTS - Future aggregate annual principal payments on all long-term debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - Schedule of Convertible Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - Warrants Issued and Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - STOCK INCENTIVE PLANS - 2009 and 2019 Stock Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - STOCK INCENTIVE PLANS - 2021 Incentive Plan and Stock Purchase and Matching Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - STOCK INCENTIVE PLANS - Fair Value Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - STOCK INCENTIVE PLANS - RSU Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - STOCK INCENTIVE PLANS - RSU Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - STOCK INCENTIVE PLANS - Stock Option Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - STOCK INCENTIVE PLANS - Stock Option Roll-forward (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - STOCK INCENTIVE PLANS - Stock-based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - STOCK INCENTIVE PLANS - Stock-based Compensation Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - INCOME TAXES - Income Before Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - INCOME TAXES - Components of Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - INCOME TAXES - Reconciliation of Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - INCOME TAXES - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - INCOME TAXES - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - INCOME TAXES - Unrecognized Tax Benefit Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - NET LOSS PER SHARE - Computation of Net Loss per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - NET LOSS PER SHARE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - NET LOSS PER SHARE - Anti-dilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - EMPLOYEE BENEFIT PLANS (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink