Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 207,136	$ 147,840
Restricted cash		31
Other current assets	4,819	3,661
Total current assets	211,955	151,532
Property and equipment, net	2,052	205
Operating lease right-of-use assets	1,989
Other assets	370	187
TOTAL ASSETS	216,366	151,924
LIABILITIES
Accounts payable	8,520	5,872
Accrued liabilities	4,550	3,251
Operating lease liabilities, current portion	516
Total current liabilities	13,586	9,123
Accrued milestone and royalty payments	1,921	2,050
Operating lease liabilities, long-term portion	1,714
Other liabilities	242	224
TOTAL LIABILITIES	17,463	11,397
Commitments and contingencies (Note 6)
STOCKHOLDERS? EQUITY
Preferred stock, $0.0001 par value, 5,500,000 shares authorized at December 31, 2019 and December 31, 2018; none issued at December 31, 2019 and December 31, 2018
Common stock, $0.0001 par value, 100,000,000 shares authorized at December 31, 2019 and December 31, 2018; 39,728,416 and 34,193,666 shares issued at December 31, 2019 and December 31, 2018, respectively	4	3
Additional paid in capital	364,712	225,352
Accumulated other comprehensive income	50	7
Accumulated deficit	(165,863)	(84,835)
TOTAL STOCKHOLDERS' EQUITY	198,903	140,527
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 216,366	$ 151,924