Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 52,548	$ 18,142
Investments	79,555	0
Prepaid expenses and other assets	2,505	813
Total current assets	134,608	18,955
Property and equipment, net	976	985
Goodwill	30,815	0
Restricted cash	1,644	207
Deposits	168	0
Investments	39,363	0
Total assets	207,574	20,147
Current liabilities:
Accounts payable and accrued expenses	8,285	2,062
Accrued research and development costs	1,861	2,459
Total current liabilities	10,146	4,521
Convertible notes, net of unamortized discount	39,842	0
Deferred rent and lease obligations	510	107
Total liabilities	50,498	4,628
Commitments and contingencies (Note 12)
Shareholders' equity:
Common stock, $0.01 par value, 120,000,000 shares authorized; 39,506,527 and 6,795,627 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	395	1
Additional paid-in capital	219,225	5,407
Accumulated other comprehensive loss	(79)	0
Accumulated deficit	(62,465)	(31,355)
Total shareholders' equity	157,076	15,519
Total liabilities and shareholders' equity	207,574	20,147
Series A Convertible Preferred Shares [Member]
Shareholders' equity:
Preferred shares	0	16,060
Series B Convertible Preferred Shares [Member]
Shareholders' equity:
Preferred shares	$ 0	$ 25,406