SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Concentration of Credit Risk and Major Customers and Revenue Recognition (Details)	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($) Customer		Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2018 USD ($) Customer		Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Concentration of Credit Risk and Major Customers and Revenue Recognition [Abstract]
Total revenues	$ 8,168,081	[1]	$ 7,850,774	$ 6,516,108	$ 14,940,183	$ 23,108,264	[1]	$ 20,742,243
Accounts receivable	14,455,354	[1]	13,648,258		13,648,258	14,455,354	[1]		$ 4,655,105
Royalties [Member]
Concentration of Credit Risk and Major Customers and Revenue Recognition [Abstract]
Total revenues	8,168,081	[1]	$ 7,815,504	6,511,700	$ 14,900,504	23,068,585	[1]	20,729,017
Licensing Revenues [Member]
Concentration of Credit Risk and Major Customers and Revenue Recognition [Abstract]
Total revenues	$ 0	[1]		4,408		$ 39,679	[1]	13,226
Endo [Member]
Concentration of Credit Risk and Major Customers and Revenue Recognition [Abstract]
Number of customers | Customer	1					1
Total revenues	$ 8,200,000			$ 6,500,000		$ 23,100,000		$ 20,700,000
Accounts receivable	$ 14,455,354					$ 14,455,354			$ 4,655,105

[1] As of January 1, 2018, the Company adopted the requirements of ASC 606 using the modified retrospective adoption method, and as a result, there is a lack of comparability of certain amounts to the prior periods presented. 3-Summary of Significant Accounting Policies for additional discussion.