0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Operations (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Loss (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Comprehensive Loss (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - FAIR VALUE MEASUREMENT link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - PROPERTY AND EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - INTANGIBLE ASSETS, NET link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - EQUITY SECURITIES link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - BORROWINGS link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - INDEMNIFICATIONS AND GUARANTEES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - STOCK-BASED AWARDS link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - REVENUE AND CONTRACT LIABILITY link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - BUSINESS SEGMENTS link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - FAIR VALUE MEASUREMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - INTANGIBLES ASSETS, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - EQUITY SECURITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - STOCK-BASED AWARDS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - REVENUE AND CONTRACT LIABILITY (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - NET LOSS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Revision of Previously Issued Financial Statements (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - FAIR VALUE MEASUREMENT - Assets and Liabilities Measured At Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - FAIR VALUE MEASUREMENT - Level 3 Investment Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - FAIR VALUE MEASUREMENT - Level 3 Liability Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - PROPERTY AND EQUIPMENT, NET (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - PROPERTY AND EQUIPMENT, NET - Capitalized Software & Website Development (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - PROPERTY AND EQUIPMENT, NET - Depreciation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - INTANGIBLE ASSETS, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - INTANGIBLE ASSETS, NET - Schedule of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - EQUITY SECURITIES - Summary Of Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - EQUITY SECURITIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - EQUITY SECURITIES - Equity Securities accounted for Under Equity Method and Related Ownership Interest (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - EQUITY SECURITIES - Net Gain (Loss) Recognized On Equity Method Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - BORROWINGS (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - LEASES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - LEASES - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - LEASES - Other Information Related To Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - LEASES - Supplemental Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - LEASES - Operating Lease Maturities and Future Minimum Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - LEASES - Operating Lease Maturities and Future Minimum Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - STOCKHOLDERS' EQUITY - Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - STOCKHOLDERS' EQUITY - JonesTrading (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - STOCKHOLDERS' EQUITY - Stock Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - STOCK-BASED AWARDS - Stock-based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - STOCK-BASED AWARDS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - STOCK-BASED AWARDS - Restricted stock unit, PSU, and Performance Share Option Award Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - REVENUE AND CONTRACT LIABILITY - Deferred Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - REVENUE AND CONTRACT LIABILITY - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - REVENUE AND CONTRACT LIABILITY - Sales Returns Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - NET LOSS PER SHARE - Income & Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - NET LOSS PER SHARE - Antidilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - BUSINESS SEGMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink