Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Is Entity a Well-known Seasoned Issuer? Is Entity a Voluntary Filer? Is Entity's Reporting Status Current? Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] ASSETS Cash Trade accounts receivable, net of allowance of $2,531 and $2,915, respectively Trade accounts receivable from related parties, net of allowance of $3,300 and $3,326, respectively Other receivables, net of allowance of $0 and $18, respectively Inventories Inventories held for sale, net of allowance of $1,811 and $1,809, respectively Prepaid taxes Advances paid Deferred tax assets Prepaid expenses and other current assets Total Current Assets Vessels, equipment and property, net Drydocking costs, net Goodwill Intangible assets, net Long-term prepaid taxes Investments Long-term other receivables, net of current portion Total Assets LIABILITIES AND EQUITY Accounts payable Accounts payable to related parties Accrued expenses Taxes payable Deferred revenue Accelerated put option liability Long-term debt - current portion Total Current Liabilities Long-term deferred revenue from related parties Long-term deferred income tax liability Total Long-Term Liabilities Total Liabilities EQUITY Common stock, $0.001 par value per share; 150,000,000 shares authorized; 52,657,574 and 52,213,757 shares issued and outstanding, respectively Additional paid-in capital Accumulated deficit Accumulated other comprehensive loss Equity attributable to Caspian Services, Inc. Shareholders Deficit attributable to noncontrolling interests Total Equity Total Liabilities and Equity ASSETS: Allowance for doubtful accounts Allowance for trade accounts receivable from related parties Allowance for other receivables Allowance for Inventory held for sale Stockholders' Equity (Deficit) Common stock, par value Common stock, authorized shares Common stock, issued shares Common stock, outstanding shares Consolidated Statements Of Operations Revenues Vessel revenues Geophysical service revenues (which includes $3,011 and $3,970 from related parties for the three and six months ended March 31, 2011, respectively) Marine base service revenues (which includes $166 and $284 from related parties for the three and six months ended March 31, 2012, respectively and $257 and $387 from related parties for the three and six months ended March 31, 2011, respectively) Total Revenues Operating Expenses Vessel operating costs Cost of geophysical service revenues Cost of marine base service Depreciation and amortization Impairment loss General and administrative expense Total Costs and Operating Expenses Income (Loss) from Operations Other Income (Expense) Interest expense Foreign currency transaction income (loss) Interest income Loss from equity method investees Other non-operating income (loss), net Net Other Expense Loss from Continuing Operations Before Income Tax Benefit from (provision for) income tax Loss from continuing operations Loss from discontinued operations Net loss Net loss attributable to noncontrolling interests Net loss attributable to Caspian Services, Inc Basic and diluted loss per share from continuing operations Basic and Diluted Loss per Share from discontinued operations Basic and diluted loss per share Weighted average shares outstanding Amounts attributable to Caspian Services, Inc: Loss from continuing operations, net of tax Discontinued operations, net of tax Net loss Consolidated Statements Of Operations Parenthetical Related party revenues Related party expenses Statement of Cash Flows [Abstract] Cash flows from operating activities: Net loss Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization Provision for losses on trade accounts receivable Provision for other accounts receivable Provision on inventory Impairment loss Accrued interest on accelerated put option Foreign currency transaction loss (gain) Stock based compensation Changes in current assets and liabilities: Trade accounts receivable Trade accounts receivable from related parties Other receivables Inventories Inventories held for sale Prepaid taxes Advances paid Deferred tax assets Prepaid expenses and other current assets Long-term prepaid taxes Long-term other receivables, net of current portion Accounts payable Accounts payable to related parties Accrued expenses Taxes payable Deferred revenue Long-term deferred revenue from related parties Long-term deferred income tax liability Net cash provided by operating activities Cash flows from investing activities: Investment in securities (Increase)/Decrease in intangible assets Payments to purchase vessels, equipment and property Net cash used in investing activities Cash flows from financing activities: Payments on long-term debt Payments on long-term debt Net cash used in financing activities Effect of exchange rate changes on cash Net change in cash Cash at beginning of period Cash at end of period Supplemental disclosure of cash flow information: Cash paid for interest Cash paid for income tax Notes to Financial Statements THE COMPANY AND BASIS OF PRESENTATION ATASH MARINE BASE NOTES PAYABLE STOCK BASED COMPENSATION PLANS COMMITMENTS AND CONTINGENCIES RELATED PARTY TRANSACTIONS FAIR VALUE MEASUREMENTS SEGMENT INFORMATION Assets, Current Assets Liabilities, Current Liabilities, Noncurrent Liabilities Stockholders' Equity Attributable to Parent Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Liabilities and Equity Revenues [Default Label] Operating Costs and Expenses Operating Income (Loss) Interest Expense Nonoperating Income (Expense) Income Tax Expense (Benefit) Income (Loss) from Continuing Operations Attributable to Parent Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Noncontrolling Interest, Other Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Depreciation, Depletion and Amortization ImpairmentLoss Foreign Currency Transaction Gain (Loss), Realized Increase (Decrease) in Accounts Receivable Increase (Decrease) in Accounts Receivable, Related Parties Increase (Decrease) in Other Receivables Increase (Decrease) in Inventories Increase (Decrease) in Retail Related Inventories Increase (Decrease) in Prepaid Taxes Increase (Decrease) in Customer Advances Increase (Decrease) in Deferred Income Taxes Increase (Decrease) in Prepaid Expense and Other Assets ChangesinLongTermPrepaidTaxes Increase (Decrease) in Other Noncurrent Assets Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable, Related Parties Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Income Taxes Increase (Decrease) in Deferred Revenue IncreaseDecreaseInLongtermDeferredRevenueRelatedParties ChanegesinLongtermdeferredincometaxliability Net Cash Provided by (Used in) Operating Activities Payments to Acquire Investments Payments to Acquire Property, Plant, and Equipment Net Cash Provided by (Used in) Investing Activities Repayments of Debt Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Cash [Default Label]