Unaudited Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2021	Dec. 31, 2020	[1]
CURRENT ASSETS
Cash and cash equivalents	$ 353,032,803	$ 423,371,036
Short-term investments	13,798,827	27,164,369
Accounts receivable, net	234,145,996	284,925,335
Inventories	263,899,976	226,291,843
Prepaid expenses and other	59,698,574	17,577,981
Total current assets	924,576,176	979,330,564
PLANT AND EQUIPMENT—NET	458,943,776	468,135,135
OTHER ASSETS
Goodwill	311,922,787	311,922,787
Long-term investments	193,418,570	162,028,068
Intangible assets, net	251,213,561	249,748,127
Patents and other assets, net	26,723,061	26,776,489
Total other assets	783,277,979	750,475,471
Total assets	2,166,797,931	2,197,941,170
CURRENT LIABILITIES
Accounts payable	101,262,288	84,784,423
Accrued liabilities	95,134,329	92,952,434
Total current liabilities	196,396,617	177,736,857
OTHER NON-CURRENT LIABILITIES	18,668,444	17,300,442
DEFERRED INCOME TAXES	35,413,881	38,960,743
Total liabilities	250,478,942	233,998,042
SHAREHOLDERS’ INVESTMENT
Common stock	14,337,995	14,621,572
Additional paid-in capital	859,678,392	852,771,508
Retained earnings	1,038,037,564	1,089,698,996
Accumulated other comprehensive income	4,265,038	6,851,052
Total shareholders’ investment	1,916,318,989	1,963,943,128
Total liabilities and shareholders’ investment	$ 2,166,797,931	$ 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.