Ordinary Shares - Additional Information (Details) - USD ($)			3 Months Ended		12 Months Ended
	Mar. 21, 2019	Feb. 27, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jun. 07, 2018
Offering costs				$ 2,426,953
Common stock, shares issued			36,817,916		36,791,906
Number of options, Exercised			(26,010)		(134,533)
Proceeds from the sale of ordinary shares				80,000,000
Restricted ordinary shares subject to forfeiture [Member]
Percentage of fully diluted shares						5.00%
Ordinary Shares [Member]
Offering costs				$ 2,426,953
Number of options, Exercised			(26,010)
Ordinary Shares [Member] | License Agreement [Member]
Ordinary shares issued in connection with a license agreement (in shares)	158,832			158,832
Private Placement [Member]
Proceeds from Issuance of Private Placement		$ 80,000,000
Shares issued, value				$ 77,573,047
Offering costs		$ 2,400,000
Common stock, shares issued		5,797,102
Private Placement [Member] | Ordinary Shares [Member]
Sale of ordinary shares in connection with private placement, net of issuance costs, shares				5,797,102
Shares issued, value				$ 225
JJDC | Private Placement [Member]
Common stock, shares issued		2,898,550