Fair Value Measurements (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | | |
Contingent consideration liability | $ 18,300 | | $ 18,300 | | $ 17,200 |
Recurring [Member] | | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | | |
Contingent consideration liability | 18,300 | | 18,300 | | 17,200 |
Money Market Funds | 92,829 | | 92,829 | | 112,808 |
Asset, total | 92,829 | | 92,829 | | 112,808 |
Liability, total | 18,300 | | 18,300 | | 17,200 |
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 | | 0 |
Money Market Funds | 92,829 | | 92,829 | | 112,808 |
Asset, total | 92,829 | | 92,829 | | 112,808 |
Liability, total | 0 | | 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 | | 0 |
Money Market Funds | 0 | | 0 | | 0 |
Asset, total | 0 | | 0 | | 0 |
Liability, total | 0 | | 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 | 18,300 | | 18,300 | | 17,200 |
Money Market Funds | 0 | | 0 | | 0 |
Asset, total | 0 | | 0 | | 0 |
Liability, total | 18,300 | | $ 18,300 | | $ 17,200 |
Azedra commercialization [Member] | | | | | |
Fair Value Measurements, Quantitative Information | | | | | |
Period of milestone expected achievement | | | 2,018 | | 2,018 |
Fair Value | 2,400 | | $ 2,400 | | $ 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 | | | 2,019 | | 2,019 |
Fair Value | 4,000 | | $ 4,000 | | $ 3,800 |
Valuation technique | | | Probability adjusted discounted cash flow model | | Probability adjusted discounted cash flow model |
Discount Rate | | | 10.00% | | 10.00% |
Probability of success | | | 59.00% | | 59.00% |
MIP-1095 commercialization [Member] | | | | | |
Fair Value Measurements, Quantitative Information | | | | | |
Period of milestone expected achievement | | | 2,023 | | 2,023 |
Fair Value | 500 | | $ 500 | | $ 400 |
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 | 11,400 | | $ 11,400 | | $ 10,700 |
Valuation technique | | | Monte-Carlo simulation | | Monte-Carlo simulation |
Net sales targets [Member] | Minimum [Member] | | | | | |
Fair Value Measurements, Quantitative Information | | | | | |
Period of milestone expected achievement | | | 2,019 | | 2,019 |
Discount Rate | | | 3.50% | | 3.50% |
Probability of success | | | 19.00% | | 19.00% |
Net sales targets [Member] | Maximum [Member] | | | | | |
Fair Value Measurements, Quantitative Information | | | | | |
Period of milestone expected achievement | | | 2,026 | | 2,026 |
Discount Rate | | | 12.00% | | 12.00% |
Probability of success | | | 59.00% | | 59.00% |
Net sales targets [Member] | Weighted average [Member] | | | | | |
Fair Value Measurements, Quantitative Information | | | | | |
Probability of success | | | 37.40% | | 37.40% |
Contingent Consideration Liability [Member] | | | | | |
Summary of activities in financial instruments with significant Level 3 inputs [Roll Forward] | | | | | |
Balance at beginning of period | 17,500 | $ 16,200 | $ 17,200 | $ 15,700 | $ 15,700 |
Total realized/unrealized gains (losses) | | | | | |
Fair value change to contingent consideration included in net loss | 800 | 400 | 1,100 | 900 | |
Balance at end of period | 18,300 | 16,600 | 18,300 | 16,600 | $ 17,200 |
Changes in unrealized gains or losses for the period included in earnings (or changes in net assets) for liabilities held at the end of the reporting period | $ 800 | $ 400 | $ 1,100 | $ 900 | |