CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Ordinary Shares	Additional Paid-In Capital	Accumulated Deficit	Other Comprehensive Income
Balance at Dec. 31, 2018	$ 90,094	$ 44	$ 212,921	$ (122,871)
Balance,Share at Dec. 31, 2018		16,214,883
Exercise of options into ordinary shares	2,047	$ 1	2,046
Exercise of options into ordinary shares, shares		336,148
Share-based compensation	7,447		7,447
Issuance of ordinary shares in public offering, net of issuance expenses	161,447	$ 11	161,436
Issuance of ordinary shares in public offering, net of issuance expenses, shares		4,207,317
Net loss	(21,444)			(21,444)
Balance at Mar. 31, 2019	239,591	$ 56	383,850	(144,315)
Balance,Share at Mar. 31, 2019		20,758,348
Balance at Dec. 31, 2019	180,302	$ 57	407,986	(228,017)	$ 276
Balance,Share at Dec. 31, 2019		21,026,184
Exercise of options into ordinary shares	293	$ 1	292
Exercise of options into ordinary shares, shares		186,756
Share-based compensation	7,617		7,617
Other comprehensive income	35				35
Net loss	(37,793)			(37,793)
Balance at Mar. 31, 2020	$ 150,454	$ 58	$ 415,895	$ (265,810)	$ 311
Balance,Share at Mar. 31, 2020		21,212,940