PROVISION FOR INCOME TAXES (Details) - USD ($)	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017	Dec. 31, 2017
PROVISION FOR INCOME TAXES [Abstract]
Provision for income taxes	$ 954,465	[1]	$ 1,422,829	$ 2,033,039	[1]	$ 3,192,512
Deferred tax assets	300,000			300,000			$ 1,700,000
Unrecognized tax benefits	$ 0			0			$ 0
Interest and penalties				$ 0
Estimated effective tax rate	18.20%			19.70%		34.80%
U.S. corporate tax rate				21.00%			35.00%

[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. See Note 2 for additional discussion.