Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 111,355	$ 18,142
Investments	94,375	0
Prepaid expenses and other assets	3,358	813
Total current assets	209,088	18,955
Property and equipment, net	2,027	985
Goodwill	30,815	0
Restricted cash	1,436	207
Deposits	545	0
Investments	7,402	0
Total assets	251,313	20,147
Current liabilities:
Accounts payable and accrued expenses	15,372	4,521
Total current liabilities	15,372	4,521
Convertible notes, net of unamortized discount	41,447	0
Deferred rent and lease obligations	457	107
Total liabilities	57,276	4,628
Commitments and contingencies (Note 13)
Shareholders' equity:
Common stock, $0.01 par value, 120,000,000 shares authorized; 45,194,736 and 6,795,627 shares issued and outstanding at December 31, 2018 and 2017, respectively	452	68
Treasury stock, at cost, 50,000 and 0 common shares at December 31, 2018 and 2017, respectively	(668)	0
Additional paid-in capital	300,253	5,340
Accumulated other comprehensive loss	(127)	0
Accumulated deficit	(105,873)	(31,355)
Total shareholders' equity	194,037	15,519
Total liabilities and shareholders' equity	251,313	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