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Summary of Significant Accounting Policies (Policies) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Restricted Cash and Cash Equivalents | Restricted Cash and Cash Equivalents Under the terms of the Loan Agreement (as defined below), net cash proceeds from the Company's Priority Review Voucher ("PRV") sale on October 31, 2018 are restricted and are held in a reserve account. Cash and cash equivalents held in the reserve account is available to pay interest, fees and principal related to the Term Loan. See Note 8 for additional information.
Recent Accounting Pronouncements | Recent Accounting Pronouncements On January 26, 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance will remain largely unchanged. Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. The same one-step impairment test will be applied to goodwill at all reporting units, even those with zero or negative carrying amounts. The revised guidance will be applied prospectively, and is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for any impairment tests performed after January 1, 2017. The Company believes the adoption of ASU No. 2017-04 will not have a significant impact on its consolidated financial statements.

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- Definition Restricted Cash and Cash Equivalents [Policy Text Block] + References No definition available. + Details
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- Definition Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact. + References No definition available. + Details
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