Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 81,732	$ 168,051
Investments	9,755	0
Prepaid expenses and other current assets	4,839	6,410
Total current assets	96,326	174,461
Property and equipment, net	2,746	2,549
Investments	22,861	0
Operating lease right-of-use assets	9,023	10,001
Other long-term assets	3,068	0
Restricted cash	91	91
TOTAL ASSETS	134,115	187,102
CURRENT LIABILITIES:
Accounts payable	2,597	5,162
Accrued expenses and other current liabilities	8,651	5,330
Operating lease liabilities	1,500	1,341
Total current liabilities	12,748	11,833
Long-term operating lease liabilities	8,787	9,927
TOTAL LIABILITIES	21,535	21,760
COMMITMENTS AND CONTINGENCIES (Note 13)	0	0
STOCKHOLDERS’ EQUITY
Preferred stock - $0.0001 par value, 10,000,000 shares authorized as of September 30, 2020 and December 31, 2019, respectively; no shares issued as of September 30, 2020 and December 31, 2019, respectively	0	0
Common stock - $0.0001 par value, 200,000,000 shares authorized as of September 30, 2020 and December 31, 2019, respectively, 34,245,433 and 34,138,750 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	3	3
Additional paid-in capital	255,937	249,441
Accumulated deficit	(143,364)	(84,102)
Accumulated other comprehensive income	4	0
Total stockholders’ equity	112,580	165,342
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 134,115	$ 187,102