Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 120,163	$ 147,840
Restricted cash		31
Other current assets	3,027	3,661
Total current assets	123,190	151,532
Property and equipment, net	390	205
Operating lease right-of-use assets	2,216
Other assets	244	187
TOTAL ASSETS	126,040	151,924
LIABILITIES
Accounts payable	8,911	5,872
Accrued liabilities	4,215	3,251
Operating lease liabilities, current portion	502
Total current liabilities	13,628	9,123
Accrued milestone and royalty payments	2,050	2,050
Operating lease liabilities, long-term portion	1,980
Other liabilities		224
TOTAL LIABILITIES	17,658	11,397
Commitments and contingencies (Note 6)
STOCKHOLDERS? EQUITY
Preferred stock, $0.0001 par value, 5,500,000 shares authorized at June 30, 2019 and December 31, 2018; none issued at June 30, 2019 and December 31, 2018
Common stock, $0.0001 par value, 100,000,000 shares authorized at June 30, 2019 and December 31, 2018; 34,193,666 shares issued and outstanding at June 30, 2019, and December 31, 2018	3	3
Additional paid in capital	227,187	225,352
Accumulated other comprehensive income/(loss)	(3)	7
Accumulated deficit	(118,805)	(84,835)
TOTAL STOCKHOLDERS' EQUITY	108,382	140,527
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 126,040	$ 151,924