Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	[1]
Current assets:
Cash and cash equivalents	$ 198,116	$ 98,426
Short-term investments	82,064	77,277
Prepaid expenses and other current assets	1,834	1,141
Amounts owed by a related party	54	25
Total current assets	282,068	176,869
Long-term investments	10,595
Property, plant and equipment-net	11,813	11,230
Equity investment in related party	515	682
Restricted cash	203	203
Other long-term assets	205	1,502
Total assets	305,399	190,486
Current liabilities
Accounts payable	3,920	3,820
Accrued liabilities	3,610	3,137
Deferred revenue, current	5,000	5,000
Other current liabilities	1,732	769
Total current liabilities	14,262	12,726
Deferred revenue, noncurrent	17,337	18,587
Deferred rent	4,655	4,740
Other long-term liabilities	2,554	565
Total liabilities	38,808	36,618
Convertible preferred stock, $0.0001 par value, no shares and 120,958,867 shares authorized as of March 31, 2018 and December 31, 2017, respectively; no shares and 30,459,574 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively; aggregate liquidation preference of 226,725, as of December 31, 2017	0	226,196
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value, 10,000,000 shares and no shares authorized as of March 31, 2018 and December 31, 2017, respectively; no shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	0
Common stock; $0.0001 par value; 400,000,000 and 153,993,227 shares authorized as of March 31, 2018 and December 31, 2017, respectively; 44,454,275 and 4,090,898 shares issued and outstanding as of March 31, 2018 and December 31, 2017 respectively	4
Additional paid-in capital	352,872	948
Accumulated deficit	(86,188)	(73,234)
Accumulated other comprehensive loss	(97)	(42)
Total stockholders’ equity (deficit)	266,591	(72,328)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	$ 305,399	$ 190,486

[1] The Condensed Consolidated Balance Sheet as of December 31, 2017 has been derived from the audited financial statements as of that date.