Unaudited Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020	[1]
CURRENT ASSETS
Cash and cash equivalents	$ 455,940,751	$ 423,371,036
Short-term investments	25,944,114	27,164,369
Accounts receivable, net	277,676,643	284,925,335
Inventories	233,060,307	226,291,843
Prepaid expenses and other	17,893,732	17,577,981
Total current assets	1,010,515,547	979,330,564
PLANT AND EQUIPMENT—NET	460,593,013	468,135,135
OTHER ASSETS
Goodwill	314,681,508	311,922,787
Long-term investments	172,934,410	162,028,068
Intangible assets, net	256,911,809	249,748,127
Patents and other assets, net	26,809,257	26,776,489
Total other assets	771,336,984	750,475,471
Total assets	2,242,445,544	2,197,941,170
CURRENT LIABILITIES
Accounts payable	107,061,936	84,784,423
Current portion of long-term debt	0	0
Accrued liabilities	116,168,057	92,952,434
Total current liabilities	223,229,993	177,736,857
OTHER NON-CURRENT LIABILITIES	18,059,874	17,300,442
DEFERRED INCOME TAXES	40,174,963	38,960,743
Total liabilities	281,464,830	233,998,042
SHAREHOLDERS’ INVESTMENT
Common stock	14,492,329	14,621,572
Additional paid-in capital	859,355,232	852,771,508
Retained earnings	1,085,178,486	1,089,698,996
Accumulated other comprehensive income (loss)	1,954,667	6,851,052
Total shareholders’ investment	1,960,980,714	1,963,943,128
Total liabilities and shareholders’ investment	$ 2,242,445,544	$ 2,197,941,170

[1] The condensed consolidated balance sheet at December 31, 2020 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.