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Disclosure - BALANCE SHEET COMPONENTS - Accrued expenses and other liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99940501 - Disclosure - DEBT AND RELATED PARTY DEBT - Summary of debt and related party debt (Details) link:presentationLink link:calculationLink link:definitionLink 99940502 - Disclosure - DEBT AND RELATED PARTY DEBT - Future principal payments (Details) link:presentationLink link:calculationLink link:definitionLink 99940901 - Disclosure - NET INCOME (LOSS) PER SHARE - EPS computation (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - SEGMENT REPORTING (Details) link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT link:presentationLink link:calculationLink link:definitionLink 99940204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Preferred Stock Liability (Details) link:presentationLink link:calculationLink link:definitionLink 99940205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - REVENUE - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 99940302 - Disclosure - REVENUE - Additional disclosures (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - REVENUE - Additional disclosures Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940404 - Disclosure - BALANCE SHEET COMPONENTS - Additional Disclosures (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - BALANCE SHEET COMPONENTS - Additional Disclosures Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940503 - Disclosure - DEBT AND RELATED PARTY DEBT - Debt Restructuring (Details) link:presentationLink link:calculationLink link:definitionLink 99940504 - Disclosure - DEBT AND RELATED PARTY DEBT - Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 99940505 - Disclosure - DEBT AND RELATED PARTY DEBT - Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 99940506 - Disclosure - DEBT AND RELATED PARTY DEBT - Conversion of Principal and Interest amounts into Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - STOCKHOLDERS' EQUITY - Common stock reserved for future issuance (Details) link:presentationLink link:calculationLink link:definitionLink 99940602 - Disclosure - STOCKHOLDERS' EQUITY - Reverse Stock Split (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - STOCK BASED COMPENSATION EXPENSE - Equity incentive plans (Details) link:presentationLink link:calculationLink link:definitionLink 99940702 - Disclosure - STOCK BASED COMPENSATION EXPENSE - Time-Based Restricted Stock (Details) link:presentationLink link:calculationLink link:definitionLink 99940703 - Disclosure - STOCK BASED COMPENSATION EXPENSE - Stock option activity (Details) link:presentationLink link:calculationLink link:definitionLink 99940704 - Disclosure - STOCK BASED COMPENSATION EXPENSE - Stock-based compensation expense (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - STOCK BASED COMPENSATION EXPENSE - Stock-based compensation expense Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 99940902 - Disclosure - NET INCOME (LOSS) PER SHARE - Anti-dilutive shares (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 99941201 - Disclosure - MAJOR CUSTOMERS AND ACCOUNTS RECEIVABLE (Details) link:presentationLink link:calculationLink link:definitionLink 99941301 - Disclosure - EMPLOYEE BENEFITS (Details) link:presentationLink link:calculationLink link:definitionLink 99941501 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - REVENUE link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - DEBT AND RELATED PARTY DEBT link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - STOCK BASED COMPENSATION EXPENSE link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - TAXES link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - NET INCOME (LOSS) PER SHARE link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - MAJOR CUSTOMERS AND ACCOUNTS RECEIVABLE link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - EMPLOYEE BENEFITS link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 99920202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 99930203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930303 - Disclosure - REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 99930403 - Disclosure - BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - DEBT AND RELATED PARTY DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - STOCK BASED COMPENSATION EXPENSE (Tables) link:presentationLink link:calculationLink link:definitionLink 99930903 - Disclosure - NET INCOME (LOSS) PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 99931403 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details) link:presentationLink link:calculationLink link:definitionLink 99940202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable and Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink