Ferring Asset Purchase Agreement and Discontinued Operations - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) payment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Maximum potential proceeds from divestiture	$ 12,700
Proceeds from sale of rights to Vitaros product line	$ 11,500
Number of expected quarterly payments for transition services | payment	2
Payment recognized related to transition services	$ 500
Repayments of debt	6,600
Liabilities assumed by purchaser after closing date	1,100
Aggregate liability under indemnification claims	$ 2,000