Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 39,179	$ 28,088
Short-term investments	133,607	148,896
Accounts receivable, other	176	0
Accounts receivable from related party	0	2,058
Prepaid expenses and other current assets	1,400	2,342
Total current assets	174,362	181,384
Property and equipment, net	2,154	1,536
Long-term investments	29,454	0
Operating lease right-of-use assets	1,704	0
Other assets	1,409	390
Total assets	209,083	183,310
Current liabilities:
Accounts payable	1,532	966
Accrued liabilities	19,806	12,969	[1]
Deferred revenue from related party	37,742	50,461
Total current liabilities	59,080	64,396
Long-term debt, net	19,786	19,689
Non-current deferred revenue from related party	63,095	84,100
Other non-current liabilities	1,122	387	[2]
Total liabilities	143,083	168,572
Commitments (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value, 200,000,000 shares authorized; 60,234,784 and 50,652,238 shares issued and outstanding at December 31, 2019 and 2018, respectively	60	51
Additional paid-in capital	495,624	389,398
Note receivable	(16)	(16)
Accumulated other comprehensive income (loss)	318	(198)
Accumulated deficit	(429,986)	(374,497)
Total stockholders’ equity	66,000	14,738
Total liabilities and stockholders’ equity	$ 209,083	$ 183,310

[1] Includes deferred rent and current portion of operating lease liabilities

[2] Includes deferred rent and non-current portion of operating lease liabilities.