Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended		12 Months Ended
	Mar. 01, 2021	Mar. 31, 2021	May 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Subsequent Event [Line Items]
Ordinary stock, nominal value (in dollars per share)				$ 0.01	$ 0.01
Proceeds from sale of stock, net of commissions			$ 35.2
Purchase agreement
Subsequent Event [Line Items]
Number of shares issued			4,144,537
Number of ordinary shares that can be purchased by warrant holders			4,144,537
Proceeds from sale of stock, net of commissions			$ 35.2
Purchasers | Purchase agreement
Subsequent Event [Line Items]
Number of shares issued			4,144,537	1,379,310
Number of ordinary shares that can be purchased by warrant holders			4,144,537	1
Proceeds from sale of stock, net of commissions				$ 18.3
Exercise price					$ 7.92
Term					2 years
Purchasers | Purchase agreement | Subsequent Event
Subsequent Event [Line Items]
Number of shares issued	9,761,010	9,761,010
Number of ordinary shares that can be purchased by warrant holders	4,880,505	4,880,505
Proceeds from sale of stock, net of commissions		$ 23.4
Gross proceeds from public offering		$ 25.4
Term		5 years
Ordinary Share Warrants | Purchasers | Purchase agreement | Subsequent Event
Subsequent Event [Line Items]
Ordinary stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Number of ordinary shares that can be purchased by warrant holders		300,000
Share and warrant price		$ 2.4525
Exercise price		$ 2.39
Pre-Funded Warrants | Purchasers | Purchase agreement | Subsequent Event
Subsequent Event [Line Items]
Number of ordinary shares that can be purchased by warrant holders		600,000
Share and warrant price		$ 2.4425
Exercise price		$ 0.01