Long-Term Related Party Payable (Details Textual) - USD ($)			1 Months Ended
	Feb. 05, 2016	Mar. 13, 2012	Dec. 31, 2013	Feb. 28, 2013	Mar. 31, 2012	Jan. 31, 2021	Sep. 30, 2018	Mar. 12, 2018	Feb. 23, 2018
Minimum
Line of Credit Facility [Line Items]
Discounted cash flow risk adjusted discount rate							15.00%
Broadfin Debt Financing
Line of Credit Facility [Line Items]
Percentage of royalty payable on net sales			0.834%
Cash consideration received on royalty agreement			$ 2,200,000
Affiliated Entity | Deerfield FSC LLC
Line of Credit Facility [Line Items]
Percentage of royalty payable on net sales				1.75%
Cash consideration received on royalty agreement				$ 2,600,000
Eclat Pharmaceuticals
Line of Credit Facility [Line Items]
Warrants issued (in shares)		2
Warrant term		6 years
Number of securities called by warrants (in shares)		3,300,000
Number of securities called by each warrant (in shares)									2,200,000
Warrant settlement cash									$ 2,911,000
American depository shares, issued (in shares)									603,000
Class of warrant or right, number of securities expired (in shares)								1,100,000
Percentage of earn-out payments					20.00%
Eclat Pharmaceuticals | Exercise Price 1
Line of Credit Facility [Line Items]
Number of securities called by each warrant (in shares)		2,200,000
Exercise price of warrants (in dollars per share)		$ 7.44
Eclat Pharmaceuticals | Exercise Price 2
Line of Credit Facility [Line Items]
Number of securities called by each warrant (in shares)		1,100,000
Exercise price of warrants (in dollars per share)		$ 11.00
FSC Holdings, LLC | Affiliated Entity | Deerfield FSC LLC
Line of Credit Facility [Line Items]
Percentage of royalty payable on net sales	15.00%
Debt instrument, periodic payment	$ 1,050,000
Debt instrument, term	5 years
FSC Holdings, LLC | Affiliated Entity | Deerfield FSC LLC | Scenario, Forecast
Line of Credit Facility [Line Items]
Debt instrument, final payment amount						$ 15,000,000
FSC Holdings, LLC | Affiliated Entity | Deerfield FSC LLC | Maximum
Line of Credit Facility [Line Items]
Royalty amount	$ 12,500,000
Royalty guarantees, commitments, term	10 years