SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Revenue Recognition, Impact on Condensed Consolidated Statement of Operations (Details) - USD ($)	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2018		Jun. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Sep. 30, 2018		Sep. 30, 2017
Revenues [Abstract]
Total revenues	$ 8,168,081	[1]	$ 7,850,774	$ 6,516,108	$ 14,940,183	$ 23,108,264	[1]	$ 20,742,243
Costs and expenses [Abstract]
General and administrative	2,232,077	[1]	2,043,952	2,175,501	4,113,585	6,345,662	[1]	6,916,501
Provision for income taxes	1,089,966	[1]	1,102,826	1,477,057	2,181,400	3,271,366	[1]	4,669,569
Net income	5,043,050	[1]	4,847,931	2,714,832	8,826,535	13,869,585	[1]	8,683,675
Royalties [Member]
Revenues [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]
Revenues [Abstract]
Total revenues	0	[1]		$ 4,408		39,679	[1]	$ 13,226
Adjusted / Balances Without Adoption of New Revenue Standard [Member] | ASU 2014-09 [Member]
Costs and expenses [Abstract]
General and administrative	2,200,000					6,300,000
Provision for income taxes	1,100,000					3,500,000
Net income	4,900,000					13,700,000
Adjusted / Balances Without Adoption of New Revenue Standard [Member] | ASU 2014-09 [Member] | Royalties [Member]
Revenues [Abstract]
Total revenues	8,100,000					23,100,000
Adjustments / Effect of Change Higher / (Lower) [Member] | ASU 2014-09 [Member]
Costs and expenses [Abstract]
General and administrative	0					0
Provision for income taxes	0					(200,000)
Net income	100,000					200,000
Adjustments / Effect of Change Higher / (Lower) [Member] | ASU 2014-09 [Member] | Royalties [Member]
Revenues [Abstract]
Total revenues	$ 100,000					$ 0

[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.