Revenue Recognition - Disaggregated Revenue By Products (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 84,131	$ 122,238	$ 238,043	$ 385,881
Feraheme
Disaggregation of Revenue [Line Items]
Revenues	44,205	36,963	126,294	99,796
Makena
Disaggregation of Revenue [Line Items]
Revenues	34,272	80,221	96,464	275,377
Intrarosa
Disaggregation of Revenue [Line Items]
Revenues	5,607	4,925	14,898	10,331
Other
Disaggregation of Revenue [Line Items]
Revenues	23	129	156	302
Product Revenue
Disaggregation of Revenue [Line Items]
Revenues	$ 84,107	$ 122,238	$ 237,812	$ 385,806

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration