Unaudited Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2018	Dec. 31, 2017		Sep. 30, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 194,017,041	$ 569,734,496	[1]	$ 561,999,767
Short-term investments	143,623,541	152,538,054	[1]
Accounts receivable, net	247,322,101	231,121,788	[1]
Inventories	213,394,037	216,765,583	[1]
Prepaid expenses and other	29,201,873	14,403,902	[1]
Total current assets	827,558,593	1,184,563,823	[1]
PLANT AND EQUIPMENT—NET	497,305,597	492,479,330	[1]
OTHER ASSETS
Goodwill	307,365,845	307,365,845	[1]
Long-term investments	141,631,510	57,782,418	[1]
Intangible assets, net	274,500,000	288,975,000	[1]
Patents and other assets, net	21,027,381	20,887,496	[1]
Total other assets	744,524,736	675,010,759	[1]
Total assets	2,069,388,926	2,352,053,912	[1]
CURRENT LIABILITIES
Accounts payable	90,041,982	89,898,467	[1]
Current portion of long-term debt	0	78,000,000	[1]
Accrued liabilities	82,844,508	75,748,540	[1]
Total current liabilities	172,886,490	243,647,007	[1]
DEFERRED INCOME TAXES	53,398,181	58,888,644	[1]
TOTAL LIABILITIES	226,284,671	302,535,651	[1]
SHAREHOLDERS’ INVESTMENT
Common stock	15,727,030	16,816,879	[1]
Additional paid-in capital	743,495,999	723,510,672
Retained earnings	1,086,003,216	1,301,997,327	[1]
Accumulated other comprehensive (loss) income	(2,121,990)	7,193,383	[1]	$ 6,005,415
Total shareholders’ investment	1,843,104,255	2,049,518,261	[1]
Total liabilities and shareholders’ investment	$ 2,069,388,926	$ 2,352,053,912	[1]

[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.