CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 2,400,273	$ 192,393	$ 4,596,437	$ 316,126
Other comprehensive income (loss):
Change in fair value of available-for-sale securities, net of tax expense (benefit) of $2,299 and $2,159 for the three months ended September 30, 2018 and 2017, respectively, and $(10,714) and $5,825 for the nine months ended September 30, 2018 and 2017, respectively	6,566	3,576	(32,180)	9,623
Realized loss on available-for-sale securities reclassified to net income, net of tax benefit of $5,601 and $119 for the three months ended September 30, 2018 and 2017, respectively, and $6,103 and $2,162 for the nine months ended September 30, 2018 and 2017, respectively	16,099	122	16,926	4,595
Other comprehensive income (loss)	22,665	3,698	(15,254)	14,218
Comprehensive income	$ 2,422,938	$ 196,091	$ 4,581,183	$ 330,344