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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 34,530 $ 71,157
Restricted cash 527 527
Short-term investments 24,764  
Accounts receivable, net 3,759 4,017
Inventory 3,720 3,597
Prepaid expenses and other current assets 2,392 2,556
Total current assets 69,692 81,854
Property and equipment, net 25,750 25,602
Right-of-use and other assets 5,519 249
Total assets 100,961 107,705
Current liabilities:    
Accounts payable 6,978 5,379
Accrued expenses and other current liabilities 18,064 15,022
Facility financing obligation 11,385 11,298
Deferred revenue - current 32,384 36,885
Recognized loss on purchase commitments - current 9,057 6,657
Total current liabilities 77,868 75,241
Senior convertible notes 19,065 19,099
Note payable to related party 72,036 72,089
Accrued interest - note payable to related party 7,969 6,835
Recognized loss on purchase commitments - long term 85,344 91,642
Deferred revenue - long term 15,867 10,680
Milestone rights liability 7,201 7,201
Operating lease liabilities 3,615  
Total liabilities 288,965 282,787
Commitments and contingencies
Stockholders' deficit:    
Common stock, $0.01 par value - 280,000,000 shares authorized, 187,778,236 and 187,029,967 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively 1,878 1,870
Additional paid-in capital 2,765,020 2,763,067
Accumulated other comprehensive loss (19) (19)
Accumulated deficit (2,954,883) (2,940,000)
Total stockholders' deficit (188,004) (175,082)
Total liabilities and stockholders' deficit $ 100,961 $ 107,705