Credit Facilities (Deerfield Warrants Narrative) (Details)	6 Months Ended
Jun. 30, 2020 USD ($)
Facility Agreement, Due 2023, Deerfield Warrants \| Facility Agreement, Due 2023
Line of Credit Facility [Line Items]
Class of warrant or right, expiration date	7 years
Class of warrant or right, exercise limitation threshold	4.985%
2017 Deerfield Warrants
Line of Credit Facility [Line Items]
Conversion of debt to equity	$ 500,000

Amount of expense (income) related to adjustment to fair value of warrant liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875

Name:	us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration