UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 579,234	$ 41,198
Other comprehensive loss:
Net unrealized losses on short-term investments	(5,996)
Currency translation adjustment	(50,366)	(250,388)
Total other comprehensive loss	(56,362)	(250,388)
Comprehensive income (loss)	$ 522,872	$ (209,190)