Unaudited Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019	[1]
CURRENT ASSETS
Cash and cash equivalents	$ 278,524,928	$ 296,321,622
Short-term investments	131,078,039	140,384,053
Accounts receivable, net	233,578,125	235,410,326
Inventories	251,006,414	248,941,855
Prepaid expenses and other	16,539,990	29,319,036
Total current assets	910,727,496	950,376,892
PLANT AND EQUIPMENT—NET	493,114,501	498,316,100
OTHER ASSETS
Goodwill	307,365,845	307,365,845
Long-term investments	177,794,760	139,909,323
Intangible assets, net	245,550,000	250,375,000
Patents and other assets, net	23,550,490	22,460,033
Total other assets	754,261,095	720,110,201
Total assets	2,158,103,092	2,168,803,193
CURRENT LIABILITIES
Accounts payable	100,099,191	97,553,917
Current portion of long-term debt	75,000,000	0
Accrued liabilities	88,858,713	74,292,883
Total current liabilities	263,957,904	171,846,800
OTHER NON-CURRENT LIABILITIES	9,091,509	7,414,424
DEFERRED INCOME TAXES	50,448,046	51,454,149
Total liabilities	323,497,459	230,715,373
SHAREHOLDERS’ INVESTMENT
Common stock	14,691,939	15,076,651
Additional paid-in capital	801,388,454	807,928,139
Retained earnings	1,018,310,446	1,116,372,133
Accumulated other comprehensive income (loss)	214,794	(1,289,103)
Total shareholders’ investment	1,834,605,633	1,938,087,820
Total liabilities and shareholders’ investment	$ 2,158,103,092	$ 2,168,803,193

[1] The condensed consolidated balance sheet at December 31, 2019 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.