Revenue Recognition - Disaggregated Revenue By Products (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 78,109	$ 146,254	$ 153,913	$ 263,642
Makena
Disaggregation of Revenue [Line Items]
Revenues	30,935	105,172	62,192	195,156
Feraheme
Disaggregation of Revenue [Line Items]
Revenues	42,074	37,699	82,089	62,833
Intrarosa
Disaggregation of Revenue [Line Items]
Revenues	4,877	3,241	9,291	5,406
MuGard
Disaggregation of Revenue [Line Items]
Revenues	90	107	133	172
Product Revenue
Disaggregation of Revenue [Line Items]
Revenues	$ 77,976	$ 146,219	$ 153,705	$ 263,567

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