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Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 171,136 $ 18,142
Short term investments 11,561 0
Prepaid expenses and other assets 2,131 813
Total current assets 184,828 18,955
Property and equipment, net 1,146 985
Goodwill 30,815 0
Restricted cash 208 207
Deposits 168 0
Total assets 217,165 20,147
Current liabilities:    
Accounts payable and accrued expenses 4,762 2,062
Accrued research and development costs 2,575 2,459
Total current liabilities 7,337 4,521
Convertible notes, net of unamortized discount 39,084 0
Deferred rent and lease liability 598 107
Total liabilities 47,019 4,628
Commitments and contingencies (Note 12)
Stockholders' equity:    
Common stock, $0.01 par value, 120,000,000 shares authorized; 39,403,898 and 6,795,627 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively 394 1
Additional paid-in capital 216,440 5,407
Accumulated other comprehensive income 10 0
Accumulated deficit (46,698) (31,355)
Total shareholders' equity 170,146 15,519
Total liabilities and stockholders' equity 217,165 20,147
Series A Convertible Preferred Shares [Member]    
Stockholders' equity:    
Preferred shares 0 16,060
Series B Convertible Preferred Shares [Member]    
Stockholders' equity:    
Preferred shares $ 0 $ 25,406