Condensed Consolidated Statements of Comprehensive Loss - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (4,848,307)	$ (5,457,898)
Other comprehensive income (loss), net of tax effect:
Unrealized gain on short-term investments	0	47,697
Foreign currency translation adjustment	(1,557)	5,497
Total other comprehensive income (loss)	(1,557)	53,194
Comprehensive loss	$ (4,849,864)	$ (5,404,704)