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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 495,072 $ 381,165
Accounts receivable 5,515 0
Inventory 7,032 0
Prepaid expenses and other current assets 11,327 8,279
Total current assets 518,946 389,444
Intangibles, net 58,675 58,200
Fixed assets, net 22,636 12,432
Other assets 4,299 1,971
Total assets 604,556 462,047
Current liabilities:    
Accounts payable 17,741 14,671
Accrued expenses 38,254 17,142
Accrued compensation 22,208 12,197
Other current liabilities 1,529 646
Total current liabilities 79,732 44,656
Debt, long-term 316,558 55,567
Other long-term liabilities 0 765
Total liabilities 396,290 100,988
Shareholders' equity:    
Common stock, $0.01 par value; 500,000,000 authorized shares, 77,307,521 and 76,610,508 issued and outstanding shares at December 31, 2018 and December 31, 2017, respectively 773 766
Additional paid-in capital 1,489,664 1,318,181
Accumulated deficit (1,282,162) (957,885)
Accumulated other comprehensive loss (9) (3)
Total shareholders' equity 208,266 361,059
Total liabilities and shareholders' equity $ 604,556 $ 462,047