SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Concentration of Credit Risk and Major Customers (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Customer	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Customer	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Concentration of Credit Risk and Major Customers [Abstract]
Total revenues	$ 8,852,986	$ 7,850,774	$ 16,982,127	$ 14,940,183
Accounts receivable	16,729,636		16,729,636		$ 16,518,687
Royalties [Member]
Concentration of Credit Risk and Major Customers [Abstract]
Total revenues	$ 8,852,986	7,815,504	$ 16,982,127	14,900,504
Endo [Member]
Concentration of Credit Risk and Major Customers [Abstract]
Number of customers | Customer	1		1
Total revenues	$ 8,900,000	$ 7,900,000	$ 17,000,000	$ 14,900,000
Accounts receivable	$ 16,700,000		$ 16,700,000		$ 16,500,000