Document and Entity Information [Abstract] Document and Entity Information. Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Consolidated Balance Sheets [Abstract] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Restricted Cash and Cash Equivalents, Current Restricted cash Accounts and Other Receivables, Net, Current Accounts and bills receivable, net Inventory, Net Inventories Prepaid Expense, Current Prepaid expenses Other Assets, Current Deposits and other assets Other Receivables, Net, Current Legal claims receivable Due from Related Parties, Current Amount due from a related party Due from Joint Ventures, Current Amount due from a jointly-controlled entity Assets, Current Total current assets Equity Method Investments Interests in jointly-controlled entities Property, Plant and Equipment, Net Property, plant and equipment, net Land use rights, net Prepaid Expense and Other Assets, Noncurrent Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred tax assets Available-for-sale Securities, Noncurrent Available-for-sale investments Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Short-term Bank Loans and Notes Payable Short term bank loans Accounts Payable, Current Accounts payable Accounts Payable, Other, Current Bills payable Customer Deposits, Current Customer deposits Accrued Employee Benefits, Current Accrued salaries, allowances and other employee benefits Loss Contingency, Accrual Carrying Value, Current Accrual for loss contingencies Other Accrued Liabilities, Current Other accrued liabilities Liabilities, Current Total current liabilities Deferred Tax Liabilities, Net, Noncurrent Deferred tax liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Shareholders' equity: Common Stock, Value, Issued Common stock, par value US$0.04 per share; 12,500,000 shares authorized; 3,229,314 shares issued as of March 31, 2012 and 2011 Preferred Stock, Value, Issued Preferred stock, par value US$0.04 per share; 250,000 shares authorized; no shares issued Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Treasury Stock, Value Less: Treasury stock, at cost, 189,587 shares as of March 31, 2012 and 2011 Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total Global-Tech Advanced Innovations Inc. shareholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Non-controlling interests Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total equity Liabilities and Equity Total liabilities and shareholders' equity Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common stock, shares issued Preferred Stock, Par or Stated Value Per Share Preferred Stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Treasury Stock, Shares Treasury stock, shares Consolidated Statements of Operations [Abstract] Sales Revenue, Goods, Net Net sales Cost of Goods Sold Cost of goods sold Gross Profit Gross profit Selling, General and Administrative Expense Selling, general and administrative expenses Other Operating Income Other operating income, net Operating Income (Loss) Operating profit (loss) Investment Income, Interest Interest income, net Other Nonoperating Income Other income, net Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income (Loss) from continuing operations before income taxes Income Tax Expense (Benefit) Income tax expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Net income (loss) Net income/loss for the year Net income (loss) attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) attributable to shareholders of Global-Tech Advanced Innovations Inc. Net Income (Loss) Attributable to Parent Income (Loss) from Continuing Operations Attributable to Parent Income (Loss) from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Plus: (Gain) loss from discontinued operations, net of taxes Income (Loss) from discontinued operations, net of tax Earnings Per Share, Basic Basic and diluted earnings (loss) per share of common stock Weighted Average Number of Shares Outstanding, Basic and Diluted Basic and diluted weighted average number of shares of common stock Rental Expense Paid Related parties Rental expense paid to related parties (included in selling, general and administrative expenses) Rental expense paid related parties. Rental Income Earned Related Party Rental income earned from a related party (included in other income (expenses), net) Rental income earned related party. Management Income Earned Related Party Management income earned from a related party (included in other income (expenses), net) Management income earned related party. Consolidated Statements of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Amortization Amortization Depreciation Depreciation Gain (Loss) on Sale of Property Plant Equipment Loss on disposal of property, plant and equipment Provision for Doubtful Accounts Allowance for doubtful accounts Share-based Compensation Stock compensation expense Deferred Income Tax Expense (Benefit) Deferred tax benefit Foreign Currency Transaction Gain (Loss), Unrealized Foreign exchange Foreign exchange Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts and bills receivable, net Increase (Decrease) in Prepaid Expense Prepaid expenses Increase (Decrease) in Deposit Assets Deposits and other assets Increase (Decrease) in Inventories Inventories Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Other Accrued Liabilities Other accrued liabilities Increase (Decrease) in Due to Related Parties, Current Amount due to a related party Increase (Decrease) in Income Taxes Payable Income tax payable Increase (Decrease) in Employee Related Liabilities Accrued salaries, allowances and other employee benefits Cash used in operating activities - continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Cash provided by (used in) operating activities - discontinued operations Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operations Accrual For Loss Contingencies Accrual for loss contingencies Accrual for loss contingencies. Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Proceeds from Sale of Property, Plant, and Equipment Proceeds from disposal of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Purchases of property, plant and equipment Payments to Acquire Land Held-for-use Increase in land use rights Proceeds from Sale of Available-for-sale Securities Proceeds from disposal of available-for-sale investments Payments to Acquire Investments Purchases of available-for-sale investments Proceeds from Sale and Collection of Notes Receivable Proceeds from maturity of convertible note and related interest receivable Cash Provided by (Used in) Investing Activities, Discontinued Operations Cash used in investing activities - discontinued operations Cash provided by investing activities - continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Increase (Decrease) in Time Deposits Decrease (increase) in time deposits Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Cash used in financing activities - discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Cash provided by (used in) financing activities - continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Increase (Decrease) in Restricted Cash Receipts (deposits) of restricted cash Proceeds from Bank Debt Proceeds from short-term bank loans Repayments of Bank Debt Settlement of short-term bank loans Purchases of Treasury Stock Purchases of treasury stock Purchases of treasury stock. Effect of Exchange Rate on Cash and Cash Equivalents Effect of foreign exchange rate changes on cash Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of fiscal year Cash and cash equivalents at beginning of fiscal year Cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosure information: Interest Paid Cash paid for interest Income Taxes Paid Cash paid for taxes Consolidated Statements of Changes in Shareholders' Equity [Abstract] Common Stock [Member] Common stock Treasury Stock [Member] Treasury stock Additional Paid-in Capital [Member] Additional paid-in capital Retained Earnings [Member] Accumulated deficit Accumulated Other Comprehensive Income (Loss) [Member] Accumulated other comprehensive income (loss) Parent [Member] Total Global-Tech shareholders' equity Noncontrolling Interest [Member] Non-controlling interests Shares, Issued Ending balance, shares Beginning balance, shares Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax unrealized gain on available-for-sale investments, net of income tax of nil Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent foreign currency translation adjustments Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total net comprehensive income Treasury Stock, Shares, Acquired Shares repurchased as treasury stock, shares Treasury Stock, Value, Acquired, Cost Method Shares repurchased as treasury stock Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock compensation expenses Stock Issued During Period, Value, Employee Benefit Plan Shares issued to an employee Stock Issued During Period, Shares, Employee Benefit Plan Shares issued to an employee, shares Statement [Table] Equity Components [Axis] Equity Component [Domain] Statement [Line Items] Subsidiaries [Abstract] Subsidiaries. Subsidiaries Disclosure [Text Block] SUBSIDIARIES Subsidiaries. Organization and Principal Activities [Abstract] Summary of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Restricted Cash [Abstract] Restricted Cash. Restricted Cash Disclosure [Text Block] Restricted Cash. RESTRICTED CASH Land Use Rights, Net [Abstract] Land Use Rights, Net. Land Use Rights Net Disclosure [Text Block] Land Use Rights, Net. LAND USE RIGHTS, NET Cash and Cash Equivalents Disclosure [Text Block] CASH AND CASH EQUIVALENTS Time Deposits [Abstract] Cash and Cash Equivalents [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] AVAILABLE-FOR-SALE INVESTMENTS Available-For-Sale Investments [Abstract] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] ACCOUNTS AND BILLS RECEIVABLE, NET Accounts and Bills Receivable, Net [Abstract] Inventories [Abstract] Inventory Disclosure [Text Block] INVENTORIES Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS Property, Plant and Equipment Disclosure [Text Block] PROPERTY, PLANT AND EQUIPMENT, NET Property, Plant and Equipment, Net [Abstract] Related Party Transactions [Abstract] Warranty Provision [Abstract] Product Warranty Disclosure [Text Block] WARRANTY PROVISION Stockholders' Equity Note Disclosure [Text Block] SHARE CAPITAL Share Capital [Abstract] Other Income (Expenses), Net [Abstract] Other Income and Other Expense Disclosure [Text Block] OTHER INCOME (EXPENSES), NET Income Taxes [Abstract] Income Tax Disclosure [Text Block] INCOME TAXES Discontinued Operations [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] DISCONTINUED OPERATIONS Basic and Diluted Earnings (Loss) Per Share [Abstract] Earnings Per Share [Text Block] BASIC AND DILUTED EARNINGS (LOSS) PER SHARE Commitments and Contingencies [Abstract] Commitments Disclosure [Text Block] COMMITMENTS Legal Matters and Contingencies [Text Block] CONTINGENCIES Employee Benefits [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] EMPLOYEE BENEFITS Segment Reporting Disclosure [Text Block] SEGMENT INFORMATION Segment Information [Abstract] Concentration Risk Disclosure [Text Block] CONCENTRATION OF RISKS Concentration of Risks [Abstract] Financial Instruments [Abstract] Financial Instruments Disclosure [Text Block] FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS Fair Value Measurements [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] STOCK COMPENSATION Stock Compensation [Abstract] Advance Paid For Property Plant And Equipment Deposits paid for purchase of property, plant and equipment Advance paid for property plant and equipment. Accrued Income Taxes, Current Income tax payable Increase (Decrease) in Other Receivables Legal claims receivable Increase Decrease In Due From Joint Venture Current Amount due from a jointly-controlled entity Increase decrease in due from joint venture current. Increase Decrease In Discounted Bills Discounted bills Increase decrease in discounted bills. Advance Made For Property Plant And Equipment Deposits paid for purchase of property, plant and equipment Advance made for property plant and equipment. Other Comprehensive Release of Unrealized Loss on Available For Sale Investments Net of Income Tax release of unrealized loss on available-for-sale investments, net of income tax of nil Other comprehensive release of unrealized loss on available for sale investments net of income tax. Bills Payable, Short Term Bank Loans and Banking Facilities [Abstract] Debt Disclosure [Text Block] BILLS PAYABLE, SHORT TERM BANK LOANS AND BANKING FACILITIES Other Accrued Liabilities [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] OTHER ACCRUED LIABILITIES Deposit Assets Disclosures Text Block TIME DEPOSITS Deposit assets. Interests in Jointly-Controlled Entities [Abstract] Equity Method Investments and Joint Ventures Disclosure [Text Block] INTERESTS IN JOINTLY-CONTROLLED ENTITIES Shares Issued To Employee Shares issued to an employee Shares issued to employee. Other Asset Impairment Charges Impairment of property, plant and equipment Held-to-maturity Securities, Current Available-for-sale investments Time Deposits Assets Time deposits assets. Nature of Operations [Text Block] ORGANIZATION AND PRINCIPAL ACTIVITIES Condensed Financial Information of Parent Company Only Disclosure [Text Block] CONDENSED FINANCIAL INFORMATION OF GLOBAL-TECH Interest and Dividend Income, Securities, Available-for-sale Interest received from available-for-sale investments Condensed Financial Information of Global-Tech [Abstract]