Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 943,771	$ 456,649
Accounts receivable, including related party amounts of $0 and $88 as of December 31, 2019 and 2018, respectively	99	88
Prepaid expenses and other current assets, including related party amounts of $0 and $3,417 as of December 31, 2019 and 2018, respectively	43,677	9,658
Total current assets	987,547	466,395
Property and equipment, net	31,330	18,500
Intangible assets, net	235	289
Restricted cash	5,041	3,163
Operating lease assets	41,502
Other non-current assets	1,097	669
Total assets	1,066,752	489,016
Current liabilities:
Accounts payable	5,944	5,069
Accrued expenses, including related party amounts of $0 and $1,700 as of December 31, 2019 and 2018, respectively	30,180	20,852
Deferred revenue current, including related party amounts of $0 and $102 as of December 31, 2019 and 2018, respectively	960	102
Accrued tax liabilities	583	402
Deferred rent		1,202
Operating lease liabilities	8,489
Other current liabilities	10,950	119
Total current liabilities	57,106	27,746
Deferred revenue, including related party amounts of $0 and $57,780 as of December 31, 2019 and 2018, respectively	11,776	57,780
Deferred rent non-current		11,052
Operating lease liabilities, net of current portion	44,050
Other non-current liabilities	14,395	243
Total liabilities	127,327	96,821
Commitments and contingencies (Note 6)
Shareholders’ equity:
Common shares, CHF 0.03 par value, 103,901,006 and 90,343,803 shares authorized at December 31, 2019 and 2018, respectively, 61,034,025 and 52,160,798 shares issued at December 31, 2019 and 2018, respectively, 60,783,799 and 51,852,862 shares outstanding at December 31, 2019 and 2018, respectively.	1,847	1,584
Treasury shares, at cost, 250,226 and 307,936 shares at December 31, 2019 and 2018, respectively	(63)	(57)
Additional paid-in capital	1,162,345	682,245
Accumulated deficit	(224,711)	(291,569)
Accumulated other comprehensive income (loss)	7	(8)
Total shareholders' equity	939,425	392,195
Total liabilities and shareholders’ equity	$ 1,066,752	$ 489,016