Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 44,740	$ 24,872
Short term investments	75,730	46,844
Restricted cash	250
Prepaid expenses and other current assets	3,649	868
Total current assets	124,369	72,584
Property and equipment, net	270	283
Right-of-use assets	1,171
Long term investments	7,341
Other assets	263	10
Total assets	133,414	72,877
Current liabilities:
Accounts Payable	2,295	495
Accrued expenses and other current liabilities	3,832	962
Total current liabilities	6,127	1,457
Total liabilities	6,127	1,457
Commitments and contingencies
Stockholders’ deficit:
Preferred Stock, $0.001 par value, 10,000,000 authorized, no shares issued and outstanding September 30, 2019 and no shares authorized, issued and outstanding at December 31, 2018
Common stock, $0.001 par value, 100,000,000 and 24,794,114 shares authorized, 26,841,149 and 3,412,366 issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	27	3
Additional paid in capital	184,590	245
Accumulated other comprehensive income (loss)	96	(49)
Accumulated deficit	(57,426)	(32,825)
Total stockholders’ equity / (deficit)	127,287	(32,626)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity / (deficit)	$ 133,414	72,877
Series A Redeemable Convertible Preferred Stock
Current liabilities:
Redeemable convertible preferred stock		17,178
Series B Redeemable Convertible Preferred Stock
Current liabilities:
Redeemable convertible preferred stock		$ 86,868