Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 40,492	$ 52,864
Marketable securities	35,417	49,154
Restricted cash	1,225	1,226
Accounts receivable	6,301	7,047
Inventory	3,331	1,964
Prepaid expenses and other current assets	6,316	3,364
Total current assets	93,082	115,619
Non-current assets:
Property and equipment, net	2,142	2,046
Restricted deposit	223	223
Right of use asset	1,901	2,158
Marketable securities		1,893
Other non-current assets	66	66
Total Assets	97,414	122,005
Current liabilities:
Accounts payable and accrued expenses	10,558	10,023
Employee related accrued expenses	4,712	9,554
Other current liabilities	1,735	1,859
Total current liabilities:	17,005	21,436
Non-current liabilities:
Long-term lease liability	1,201	1,497
Uncertain tax positions liability	2,717	2,717
Total Liabilities	20,923	25,650
Commitments and contingencies (Note 14)
Shareholders' equity:
Ordinary shares, NIS 0.01 par value; 100,000,000 shares authorized at March 31, 2021 and December 31, 2020; 22,280,394 and 22,167,791 shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively	61	60
Additional paid-in capital	458,723	452,525
Accumulated deficit	(382,436)	(356,501)
Accumulated other comprehensive income	143	271
Total Shareholders' Equity	76,491	96,355
Total Liabilities and Shareholders' Equity	$ 97,414	$ 122,005