Unaudited Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2018	Dec. 31, 2017	[1]
CURRENT ASSETS
Cash and cash equivalents	$ 296,699,141	$ 569,734,496
Short-term investments	171,020,806	152,538,054
Accounts receivable, net	239,406,379	231,121,788
Inventories	212,375,655	216,765,583
Prepaid expenses and other	23,575,408	14,403,902
Total current assets	943,077,389	1,184,563,823
PLANT AND EQUIPMENT—NET	499,673,418	492,479,330
OTHER ASSETS
Goodwill	307,365,845	307,365,845
Long-term investments	141,305,695	57,782,418
Intangible assets, net	279,325,000	288,975,000
Patents and other assets, net	21,361,937	20,887,496
Total other assets	749,358,477	675,010,759
Total assets	2,192,109,284	2,352,053,912
CURRENT LIABILITIES
Accounts payable	106,784,447	89,898,467
Current portion of long-term debt	23,125,000	78,000,000
Accrued liabilities	84,525,227	75,748,540
Total current liabilities	214,434,674	243,647,007
DEFERRED INCOME TAXES	56,175,298	58,888,644
TOTAL LIABILITIES	270,609,972	302,535,651
SHAREHOLDERS’ INVESTMENT
Common stock	16,135,387	16,816,879
Additional paid-in capital	748,794,815	723,510,672
Retained earnings	1,157,048,214	1,301,997,327
Accumulated other comprehensive (loss) income	(479,104)	7,193,383
Total shareholders’ investment	1,921,499,312	2,049,518,261
Total liabilities and shareholders’ investment	$ 2,192,109,284	$ 2,352,053,912

[1] The condensed consolidated balance sheet at December 31, 2017 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.3