Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 1,034,334	$ 160,430
Marketable securities	126,211	963,752
Accounts receivable, net	82,200	45,329
Inventory, net	53,673	39,148
Prepaid expenses and other current assets	23,560	19,408
Total current assets	1,319,978	1,228,067
Long-term Assets:
Property, plant and equipment, net	370,532	245,259
Goodwill and intangibles, net	44,385	46,281
Other long-term assets, net	24,373	4,415
Total assets	1,759,268	1,524,022
Current Liabilities:
Accounts payable	19,158	28,141
Accrued liabilities	134,832	100,644
Accrued interest	1,168	4,172
Convertible notes, net, current portion	315,643
Debt, current portion	601	8
Other short-term liabilities	9,290	3,204
Total current liabilities	480,692	136,169
Long-term Liabilities:
Long-term convertible notes, net, less current portion	476,527	664,749
Long-term debt, less current portion	24,254	24,494
Other long-term liabilities	29,511	17,669
Total liabilities	1,010,984	843,081
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $0.01 par value Authorized-5,000,000 shares issued and outstanding-no shares at September 30, 2019 and December 31, 2018
Common stock, $0.01 par value Authorized-200,000,000 shares issued and outstanding-129,817,885 and 123,192,540 shares at September 30, 2019 and December 31, 2018	1,299	1,232
Additional paid-in capital	1,945,046	1,716,894
Accumulated other comprehensive loss	(360)	(1,422)
Accumulated deficit	(1,197,701)	(1,035,763)
Total stockholders' equity	748,284	680,941
Total liabilities and stockholders' equity	$ 1,759,268	$ 1,524,022