UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 980,696	$ 857,790	$ 2,719,016	$ (250,404)
Other comprehensive income (loss):
Net unrealized gains (losses) on short-term investments	1,458		2,059
Currency translation adjustment	60,813	130,280	(82,273)	142,155
Total other comprehensive income (loss)	62,271	130,280	(80,214)	142,155
Comprehensive income (loss)	$ 1,042,967	$ 988,070	$ 2,638,802	$ (108,249)