Nature of the Business and Liquidity (Details)					3 Months Ended		6 Months Ended
	Jul. 16, 2018 USD ($)	Jun. 01, 2018 USD ($)	May 04, 2018 USD ($)	Apr. 27, 2018 USD ($)	Jun. 30, 2018 USD ($) product segment	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) product segment	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	[1]	Dec. 16, 2014
Summary of Significant Accounting Policies Details [Line Items]
Segments | segment					1		1
Net loss					$ (20,716,000)	$ (919,000)	$ (25,518,000)	$ (88,000)
Net decrease in cash, cash equivalents and restricted cash							12,478,000	$ 16,326,000
Accumulated deficit					(85,612,000)		(85,612,000)		$ (60,094,000)
Investments							12,300,000
Shelf offering			$ 50,000,000
Prior period reclassification adjustment					$ 400,000		$ 300,000
United States
Summary of Significant Accounting Policies Details [Line Items]
Generic products marketed | product					28
Branded generic products marketed | product					4
Number of products, launched | product							5
Minimum | Canada
Summary of Significant Accounting Policies Details [Line Items]
Generic and branded products marketed | product					30
Convertible Note 2019
Summary of Significant Accounting Policies Details [Line Items]
Stated interest rate					3.75%		3.75%		3.75%
Debt, transfer				$ 75,100,000
Face amount of the Notes					$ 68,660,000		$ 68,660,000		$ 143,750,000
Convertible Note 2023
Summary of Significant Accounting Policies Details [Line Items]
Stated interest rate					4.75%		4.75%		4.75%
Face amount of the Notes					$ 75,090,000		$ 75,090,000
Term Loan 2021
Summary of Significant Accounting Policies Details [Line Items]
Face amount of the Notes		$ 25,000,000			$ 15,000,000		$ 15,000,000
Proceeds from lines of credit		$ 15,000,000
Subsequent Event | Term Loan 2021
Summary of Significant Accounting Policies Details [Line Items]
Proceeds from lines of credit	$ 10,000,000
Convertible Notes Payable | Convertible Note 2019
Summary of Significant Accounting Policies Details [Line Items]
Stated interest rate					3.75%		3.75%				3.75%
Debt, transfer							$ 75,100,000
Convertible Notes Payable | Convertible Note 2023
Summary of Significant Accounting Policies Details [Line Items]
Stated interest rate				4.75%	4.75%		4.75%
Debt, transfer				$ 75,100,000			$ 75,100,000

[1] Derived from the audited December 31, 2017 financial statement