CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 26,468	$ 49,688
Marketable securities	92,623	97,389
Restricted cash	1,223	523
Prepaid expenses and other current assets	1,552	1,034
TOTAL CURRENT ASSETS	121,866	148,634
NON-CURRENT ASSETS
Property and equipment, net	991	977
Restricted deposit	223	223
Right of use asset	3,433	3,735
Marketable securities	40,137	48,555
Other non-current assets	279	264
TOTAL ASSETS	166,929	202,388
CURRENT LIABILITIES:
Accounts payable and accrued expenses	8,500	11,186
Employee related accrued expenses	4,075	6,711
Other current liabilities	1,632	1,585
TOTAL CURRENT LIABILITIES	14,207	19,482
NON-CURRENT LIABILITIES:
Long-term lease liability	2,268	2,604
TOTAL LIABILITIES	16,475	22,086
COMMITMENTS AND CONTINGENCIES (Note 14)
SHAREHOLDERS’ EQUITY:
Ordinary shares, NIS 0.01 par value; 100,000,000 shares authorized at March 31, 2020 and December 31, 2019; 21,212,940 and 21,026,184 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively	58	57
Additional paid-in capital	415,895	407,986
Accumulated deficit	(265,810)	(228,017)
Accumulated other comprehensive income	311	276
TOTAL SHAREHOLDERS’ EQUITY	150,454	180,302
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 166,929	$ 202,388