CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 838.1	$ 213.7
Short-term investments	58.6	162.4
Accounts receivable trade, less allowance for credit losses of $3.6 and $3.8	85.4	69.3
Inventories	124.9	101.0
Prepaid expenses and other current assets	53.4	44.6
Total current assets	1,160.4	591.0
Long-term investments	0.5	58.4
Property, plant and equipment, net	449.2	399.4
Other intangible assets, net	10.4	13.2
Goodwill	39.7	39.8
Other assets	50.4	41.1
Total assets	1,710.6	1,142.9
Current Liabilities
Accounts payable	57.0	54.5
Accrued expenses and other current liabilities	118.2	103.2
Total current liabilities	175.2	157.7
Convertible debt, net	921.5	887.9
Other liabilities	18.9	21.4
Total liabilities	1,115.6	1,067.0
Commitments and contingencies (Note 9)
Stockholders’ Equity
Preferred stock, $.001 par value, 5,000,000 authorized; none issued and outstanding	0.0	0.0
Common stock, $.001 par value, 100,000,000 authorized; 65,871,736 and 62,685,492 issued and outstanding	0.1	0.1
Additional paid-in capital	1,244.7	749.0
Accumulated deficit	(649.2)	(672.0)
Accumulated other comprehensive loss	(0.6)	(1.2)
Total stockholders’ equity	595.0	75.9
Total liabilities and stockholders’ equity	$ 1,710.6	$ 1,142.9