Fair Value Measurements (Details) (USD $) | 3 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Contingent consideration liability | $16,200 | $15,900 | $15,700 |
Auction rate securities | 2,208 | ' | 2,208 |
Maturity period of US government subsidized securities (in years) | '10 years | ' | ' |
Duration of securities subject to temporary impairment, minimum (in months) | '12 months | ' | ' |
Amount of temporary impairment | 192 | ' | 192 |
Auction Rate Securities [Member] | ' | ' | ' |
Summary of activities in financial instruments with significant Level 3 inputs [Roll Forward] | ' | ' | ' |
Balance at beginning of period | 2,208 | 3,240 | 3,240 |
Transfers into Level 3 | 0 | 0 | ' |
Total gains (losses) | ' | ' | ' |
Included in net loss | 0 | 0 | ' |
Included in other comprehensive loss | 0 | 8 | ' |
Settlements at par | 0 | -100 | ' |
Balance at end of period | 2,208 | 3,148 | 2,208 |
Changes in unrealized gains or losses for the period included in earnings (or changes in net assets) for assets or liabilities held at the end of the reporting period | 0 | 0 | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Fair Value | 2,208 | ' | 2,208 |
Valuation technique | 'Discounted cash flow model | ' | 'Discounted cash flow model |
Auction Rate Securities [Member] | Minimum [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Redemption period | '5 years | ' | '5 years |
Discount Rate | 0.25% | ' | 0.25% |
Auction Rate Securities [Member] | Maximum [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Redemption period | '15 years | ' | '15 years |
Discount Rate | 3.00% | ' | 3.00% |
Auction Rate Securities [Member] | Weighted average [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Redemption period | '6 years | ' | '6 years |
Discount Rate | 1.55% | ' | 1.55% |
Azedra commercialization [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Period of milestone expected achievement | '2017 | ' | '2017 |
Fair Value | 2,300 | ' | 2,300 |
Valuation technique | 'Probability adjusted discounted cash flow model | ' | 'Probability adjusted discounted cash flow model |
Discount Rate | 10.00% | ' | 10.00% |
Probability of success | 40.00% | ' | 40.00% |
MIP - 1404 commercialization [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Period of milestone expected achievement | '2018 | ' | '2018 |
Fair Value | 2,100 | ' | 2,000 |
Valuation technique | 'Probability adjusted discounted cash flow model | ' | 'Probability adjusted discounted cash flow model |
Discount Rate | 10.00% | ' | 10.00% |
Probability of success | 31.00% | ' | 31.00% |
MIP-1095 commercialization [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Period of milestone expected achievement | '2021 | ' | '2021 |
Fair Value | 500 | ' | 500 |
Valuation technique | 'Probability adjusted discounted cash flow model | ' | 'Probability adjusted discounted cash flow model |
Discount Rate | 10.00% | ' | 10.00% |
Probability of success | 19.00% | ' | 19.00% |
Net sales targets [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Fair Value | 11,300 | ' | 10,900 |
Valuation technique | 'Monte-Carlo simulation | ' | 'Monte-Carlo simulation |
Discount Rate | 12.50% | ' | 12.50% |
Net sales targets [Member] | Minimum [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Period of milestone expected achievement | '2018 | ' | '2018 |
Probability of success | 19.00% | ' | 19.00% |
Net sales targets [Member] | Maximum [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Period of milestone expected achievement | '2022 | ' | '2022 |
Probability of success | 40.00% | ' | 40.00% |
Net sales targets [Member] | Weighted average [Member] | ' | ' | ' |
Fair Value Measurements, Quantitative Information | ' | ' | ' |
Probability of success | 32.80% | ' | 32.80% |
Contingent Consideration Liability [Member] | ' | ' | ' |
Summary of activities in financial instruments with significant Level 3 inputs [Roll Forward] | ' | ' | ' |
Balance at beginning of period | 15,700 | 0 | 0 |
Total gains (losses) | ' | ' | ' |
Fair value of contingent consideration - acquisition of Molecular Insight | 0 | 15,900 | ' |
Fair value change to contingent consideration included in net loss | 500 | 0 | ' |
Balance at end of period | 16,200 | 15,900 | ' |
Changes in unrealized gains or losses for the period included in earnings (or changes in net assets) for assets or liabilities held at the end of the reporting period | 500 | 0 | ' |
U.S. Government Subsidized Securities [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Auction rate securities | 2,208 | ' | ' |
Recurring [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Contingent consideration liability | 16,200 | ' | 15,700 |
Money Market Funds | 85,373 | ' | 60,364 |
Auction rate securities | 2,208 | ' | 2,208 |
Asset, total | 87,581 | ' | 62,572 |
Liability, total | 16,200 | ' | 15,700 |
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Contingent consideration liability | 0 | ' | 0 |
Money Market Funds | 85,373 | ' | 60,364 |
Auction rate securities | 0 | ' | 0 |
Asset, total | 85,373 | ' | 60,364 |
Liability, total | 0 | ' | 0 |
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Contingent consideration liability | 0 | ' | 0 |
Money Market Funds | 0 | ' | 0 |
Auction rate securities | 0 | ' | 0 |
Asset, total | 0 | ' | 0 |
Liability, total | 0 | ' | 0 |
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Contingent consideration liability | 16,200 | ' | 15,700 |
Money Market Funds | 0 | ' | 0 |
Auction rate securities | 2,208 | ' | 2,208 |
Asset, total | 2,208 | ' | 2,208 |
Liability, total | $16,200 | ' | $15,700 |