WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Loss Per Share [Abstract] LOSS PER COMMON SHARE: Net Income (Loss) Attributable to Parent NET LOSS Net loss Income Tax Expense (Benefit) INCOME TAX PROVISION (BENEFIT) INCOME TAX PROVISION (BENEFIT) Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest (LOSS) INCOME BEFORE INCOME TAXES LOSS BEFORE INCOME TAXES Nonoperating Income (Expense) Total other income (expense), net Other expense, net Other Nonoperating Income (Expense) Interest expense Interest Expense, Total Interest Expense Interest income Investment Income, Interest Nonoperating Income (Expense) [Abstract] OTHER INCOME (EXPENSE), NET: Operating Income (Loss) OPERATING LOSS Total expenses Costs and Expenses Selling, general and administrative Selling, General and Administrative Expense Research and development Research and Development Expense, Total Research and Development Expense Cost of goods manufactured and sold Cost of Goods Sold, Total Cost of Goods Sold EXPENSES: Costs and Expenses [Abstract] Total revenues Sales Revenue, Net Product sales, net Sales Revenue, Goods, Net, Total Sales Revenue, Goods, Net Royalty revenues Royalty Revenue, Total Royalty Revenue Manufacturing revenues Revenue Other Manufactured Products REVENUES: Sales Revenue, Net [Abstract] Non-voting Common Stock Interest expense Condensed Consolidated Statements of Operations [Abstract] Condensed Consolidated Balance Sheets [Abstract] Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets. TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Stockholders' Equity Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total shareholders' equity Retained Earnings (Accumulated Deficit) Accumulated deficit Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Accumulated deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax Additional paid-in capital Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock Treasury Stock, Value Treasury stock, at cost (10,066,815 and 9,945,265 shares at December 31, 2010 and March 31, 2010, respectively) Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Treasury stock, at cost (xxxxxxxx and 9,945,265 shares at September 30, 2010 and March 31, 2010, respectively) Common stock Common Stock, Value, Issued, Total Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued Stockholders' Equity Attributable to Parent [Abstract] SHAREHOLDERS' EQUITY: Commitments and Contingencies COMMITMENTS AND CONTINGENCIES (Note 13) Total liabilities Liabilities OTHER LONG-TERM LIABILITIES Other Liabilities, Noncurrent DEFERRED REVENUE - LONG-TERM Deferred Revenue, Noncurrent, Total Deferred Revenue, Noncurrent Total current liabilities Liabilities, Current Deferred revenue - current Deferred Revenue, Current, Total Deferred Revenue, Current Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current, Total Accounts Payable and Accrued Liabilities, Current CURRENT LIABILITIES: Liabilities, Current [Abstract] Liabilities and Stockholders' Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY TOTAL ASSETS Assets OTHER ASSETS Other Assets, Noncurrent PROPERTY, PLANT AND EQUIPMENT, NET Property, Plant and Equipment, Net, Total Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net Total current assets Assets, Current Prepaid expenses and other current assets Inventory Inventory, Net, Total Inventory, Net Receivables Receivables, Net, Current, Total Receivables, Net, Current Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Total CASH AND CASH EQUIVALENTS - Beginning of period CASH AND CASH EQUIVALENTS - End of period Cash and Cash Equivalents, at Carrying Value CURRENT ASSETS: Assets, Current [Abstract] ASSETS Assets [Abstract] Treasury stock, shares Treasury Stock, Shares, Beginning Balance Treasury Stock, Shares, Ending Balance Treasury Stock, Shares 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, Total Common stock, shares issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Fair Value Measurements [Abstract] Fair Value Measurements. FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Comprehensive Loss [Abstract] Comprehensive Income Note [Text Block] COMPREHENSIVE LOSS Income Taxes [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] SHARE-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Earnings Per Share [Text Block] LOSS PER SHARE Commitments and Contingencies [Abstract] Commitments And Contingencies. COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Common Stock Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Condensed Consolidated Statements of Cash Flows [Abstract] Property, Plant and Equipment [Abstract] Share-Based Compensation [Abstract] Restructuring [Abstract] RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Accounts Payable and Accrued Expenses [Abstract] ACCOUNTS PAYABLE AND ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] INVENTORY Inventory Disclosure [Text Block] Inventory [Abstract] Increase Decrease In Inventory, prepaid expenses and other assets Inventory, prepaid expenses and other assets Inventory, prepaid expenses and other assets Increase Decrease In Inventory, prepaid expenses and other assets. Proceeds from the issuance of common stock for share-based compensation arrangements Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Total Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] SUPPLEMENTAL CASH FLOW DISCLOSURE: Supplemental Cash Flow Information [Abstract] Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents, Period Increase (Decrease), Total NET DECREASE IN CASH AND CASH EQUIVALENTS Cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities Purchase of common stock for treasury Payments for Repurchase of Common Stock CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities Cash flows provided by investing activities Sales of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment, Total Proceeds from Sale of Property, Plant, and Equipment Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Property, Plant, and Equipment CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net Cash Provided by (Used in) Operating Activities Cash flows used in operating activities Deferred revenue Increase (Decrease) in Deferred Revenue Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (Decrease) in Receivables Receivables Increase (Decrease) in Receivables, Total Receivables Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Other non-cash charges Other Noncash Expense Share-based compensation expense Share-based Compensation, Total Share-based Compensation Depreciation Depreciation, Total Depreciation Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to cash flows from operating activities: Purchase of property, plant and equipment Purchase of common stock for treasury Investments - short-term Available-for-sale Securities, Debt Securities, Current, Total Available-for-sale Securities, Debt Securities, Current INVESTMENTS - LONG-TERM Marketable Securities, Noncurrent, Total Marketable Securities, Noncurrent Other long-term liabilities Increase (Decrease) in Other Operating Liabilities Purchases of investments Payments to Acquire Marketable Securities, Total Purchases of investments Payments to Acquire Marketable Securities Sales and maturities of investments Proceeds from Sale and Maturity of Marketable Securities Cash paid for interest Interest Paid Cash paid for taxes Income Taxes Paid Purchased capital expenditures included in accounts payable and accrued expenses Noncash or Part Noncash Acquisition, Value of Liabilities Assumed, Total Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Summary of Significant Accounting Policies [Abstract] INVESTMENTS Marketable Securities [Text Block] Investments [Abstract] Debt Instrument, Interest Rate, Stated Percentage RISPERDAL CONSTA Secured Notes, percentage RISPERDAL CONSTA Secured Notes Percentage RISPERDAL CONSTA secured notes, principal RISPERDAL CONSTA Secured Notes Percentage. Research and development revenue under collaborative arrangements Contracts Revenue Other Notes Payable, Current Non-Recourse RISPERDAL CONSTA Secured 7% Notes -Current Net Collaborative Profit Revenue earned during the period under the license and collaboration agreement with Cephalon, Inc. for the sale of Vivitrol in the U.S. Net collaborative profit Proceeds from (Repayments of) Notes Payable Proceeds from (Repayments of) Notes Payable, Total Payment of non-recourse RISPERDAL CONSTA secured 7% notes principal Document Fiscal Year Focus Document Fiscal Period Focus Document and Entity Information [Abstract] Document and Entity Information. Payment of non recourse Product secured Seven Percent notes principal attributable to original issue discount Payment of non-recourse RISPERDAL CONSTA secured 7% notes principal attributable to original issue discount Payment of non-recourse RISPERDAL CONSTA secured 7% notes principal attributable to original issue discount Payment of non-recourse 7% notes principal attributable to original issue discount. Basic and diluted Earnings Per Share, Basic Weighted Average Number of Shares Outstanding, Basic Basic and diluted Payments to Acquire Other Investments Investment in Acceleron Pharmaceuticals, Inc. Investment in Acceleron Pharmaceuticals, Inc. Long-Term Debt [Abstract] Long-term Debt [Text Block] LONG-TERM DEBT Noncash or Part Noncash Acquisition, Investments Acquired Investment in Civitas Therapeutics, Inc.