INCOME TAXES (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current taxes [Abstract]
Federal		$ 4,612,874	$ 5,513,691	$ 8,571,034
State		40,958	(26,580)	98,881
Total current taxes		4,653,832	5,487,111	8,669,915
Deferred taxes [Abstract]
Federal		86,634	1,548,247	(2,647,363)
State		3,542	2,169	(19,787)
Total deferred taxes		90,176	1,550,416	(2,667,150)
Total provision for income taxes	$ 1,500,000	$ 4,744,008	$ 7,037,527	$ 6,002,765
Effective income tax rate differs from federal statutory tax rate [Abstract]
Statutory rate		21.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit		0.13%	(0.08%)	0.26%
Stock-based compensation		(1.64%)	(3.33%)	(0.50%)
Deferred rate change		0.01%	6.21%	0.00%
Miscellaneous other, net		(0.37%)	0.52%	(0.21%)
Effective tax rate		19.13%	38.32%	34.55%
Income tax charge		$ 1,100,000
Deferred tax assets [Abstract]
Deferred revenue	0	0	$ 1,344,232
Stock option based compensation	239,492	239,492	322,524
Other	74,276	74,276	72,950
Net deferred tax asset	313,768	313,768	1,739,706
Unrecognized tax benefits	$ 0	0	$ 0
Interest and penalties		$ 0