Organization and Summary of Significant Accounting Policies - Liquidity (Details) $ / shares in Units, $ in Thousands				1 Months Ended			3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 10, 2017 USD ($) $ / shares shares	Apr. 26, 2017 USD ($) $ / shares shares	Mar. 08, 2017 USD ($)	Apr. 30, 2017 USD ($)	Oct. 31, 2016	Jan. 31, 2016 $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Apr. 20, 2017 $ / shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Feb. 28, 2015 $ / shares	Oct. 17, 2014 $ / shares shares	Aug. 25, 2014 USD ($)
Basis Of Presentation [Line Items]
Accumulated deficit							$ (313,541)			$ (313,541)	$ (313,541)			$ (316,308)
Working capital							6,900			6,900	6,900
Net income							(3,832)	$ (1,291)			2,767	$ (7,134)
Cash							$ 8,463	$ 5,614		$ 8,463	$ 8,463	$ 5,614		$ 2,087	$ 3,887
Net proceeds from sale of common stock and warrants after transaction costs									$ 9,600
Shares issuable upon exercise (in shares) | shares							7,270,070			7,270,070	7,270,070
Maximum potential proceeds from divestiture			$ 12,700
Proceeds from sale of rights to Vitaros product line			11,500
Proceeds from sale of product related inventory				$ 709
Payment recognized related to transition services										$ 500
Shelf registration statement, available amount							$ 100,000			100,000	$ 100,000							$ 100,000
Entity public float, primary public offerings of securities, threshold (less than)							$ 75,000			$ 75,000	$ 75,000
Percent of public float eligible to to be raised if under threshold (as a percent)							33.33%			33.33%	33.33%
Reverse stock split, conversion ratio (as a percent)					0.1
Loan and Security Agreement
Basis Of Presentation [Line Items]
Repayments of debt			$ 6,600
September 2017 Warrants
Basis Of Presentation [Line Items]
Shares issuable upon exercise (in shares) | shares							1,068,307			1,068,307	1,068,307
Exercise price (in usd per share) | $ / shares							$ 1.67			$ 1.67	$ 1.67
September 2017 Placement Agent Warrants
Basis Of Presentation [Line Items]
Shares issuable upon exercise (in shares) | shares							106,831			106,831	106,831
Exercise price (in usd per share) | $ / shares							$ 2.16			$ 2.16	$ 2.16
Common Stock
Basis Of Presentation [Line Items]
Exercise price (in usd per share) | $ / shares						$ 8.80										$ 18.20
Number of securities called by each warrant (in shares) | shares						0.5
September 2017 Financing
Basis Of Presentation [Line Items]
Net proceeds from sale of common stock and warrants after transaction costs	$ 3,100
September 2017 Financing | September 2017 Warrants
Basis Of Presentation [Line Items]
Shares issuable upon exercise (in shares) | shares	1,068,307
Exercise price (in usd per share) | $ / shares	$ 1.67
Date from which warrants are exercisable	Sep. 13, 2017
Warrant expiration period	2 years 6 months
September 2017 Financing | September 2017 Placement Agent Warrants
Basis Of Presentation [Line Items]
Exercise price (in usd per share) | $ / shares	$ 2.16
Warrant expiration period	2 years 6 months
September 2017 Financing | H.C. Wainwright | September 2017 Placement Agent Warrants
Basis Of Presentation [Line Items]
Shares issuable upon exercise (in shares) | shares	106,831
April 2017 Financing
Basis Of Presentation [Line Items]
Exercise price (in usd per share) | $ / shares		$ 1.55
Warrant expiration period		5 years
Sale of stock, price per share (in usd per share) | $ / shares		$ 1.40
April 2017 Financing | Underwriter Warrants
Basis Of Presentation [Line Items]
Exercise price (in usd per share) | $ / shares		$ 1.75
Warrant expiration period		5 years
April 2017 Warrant Amendment | Private Placement And Placement Agent Warrants
Basis Of Presentation [Line Items]
Exercise price (in usd per share) | $ / shares													$ 1.55
Common Stock
Basis Of Presentation [Line Items]
Issuance of common stock (in shares) | shares						252,842
Common Stock | Loan and Security Agreement
Basis Of Presentation [Line Items]
Shares issuable upon exercise (in shares) | shares																	19,380
Exercise price (in usd per share) | $ / shares																	$ 12.90
Common Stock | September 2017 Financing
Basis Of Presentation [Line Items]
Issuance of common stock (in shares) | shares	2,136,614
Shares issued, price per share (in usd per share) | $ / shares	$ 1.73
Common Stock | April 2017 Financing
Basis Of Presentation [Line Items]
Net proceeds from financing transaction		$ 5,900
Number of securities called by each warrant (in shares) | shares		0.75
Common Stock | April 2017 Financing | H.C. Wainwright
Basis Of Presentation [Line Items]
Number of units sold in transaction (in shares) | shares		5,030,000
Common Stock | April 2017 Financing | H.C. Wainwright | Underwriter Warrants
Basis Of Presentation [Line Items]
Shares issuable upon exercise (in shares) | shares		251,500