0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - ORGANIZATION AND DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - BUSINESS SEGMENT AND REVENUE link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - NET LOSS PER COMMON SHARE link:presentationLink link:calculationLink link:definitionLink 9952168 - 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 - BUSINESS SEGMENT AND REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - NET LOSS PER COMMON SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - BUSINESS SEGMENT AND REVENUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - BUSINESS SEGMENT AND REVENUE - Schedule of Disaggregated Revenue by Payor Type and Major Service (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - BUSINESS SEGMENT AND REVENUE - Schedule of Changes in Provision for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - BUSINESS SEGMENT AND REVENUE - Schedule of Changes in Contractual Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Fair Value of Company's Financial Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value of Strategic Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Changes in Estimated Fair Value of Strategic Investments Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - FAIR VALUE MEASUREMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of The Recurring Level 3 Fair Value Measurements of The Loan Investment (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of The Recurring Level 3 Fair Value Measurements of Contingent Consideration Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Changes in Estimated Fair Value of Contingent Consideration Liabilities Measured on a Recurring Basis (Level 3) (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Fair Value of Senior Convertible Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Inventory Components (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - BALANCE SHEET COMPONENTS - Prepaid Expenses and Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - BALANCE SHEET COMPONENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Property and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Accrued Liabilities Components (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - COMMITMENTS AND CONTINGENCIES - Schedule of Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - COMMITMENTS AND CONTINGENCIES - Schedule of Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - DEBT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - DEBT - Schedule of Convertible Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - DEBT - Schedule of Components of Interest Expense and the Effective Interest Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - NET LOSS PER COMMON SHARE - Schedule of Computation of Basic and Diluted Net Loss per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - NET LOSS PER COMMON SHARE - Schedule of Anti-dilutive Securities Excluded from Diluted Net Loss per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink