Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (19,297,664)	$ (16,453,918)
Other comprehensive income (loss), net of tax effect:
Unrealized gain (loss) on short-term investments	2,299	(2,308)
Foreign currency translation adjustment	(3,810)	(1,145)
Total other comprehensive loss	(1,511)	(3,453)
Comprehensive loss	$ (19,299,175)	$ (16,457,371)