CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 249,233	$ 89,368	$ 573,901	$ 543,969
Comprehensive income	$ 249,233	$ 89,368	$ 573,901	$ 543,969