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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income from consolidated operations $ 291,411,199 $ 316,820,194
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 78,808,967 70,887,294
Gain on disposal of assets (161,501) (1,279,049)
Loss on disposal of assets 13,243 48,618
Gain on sale of investments and technology investment income (1,637,823) (4,736,312)
Loss on sale of investments and technology investment losses 6,630,483 14,839,974
Reserve for credit losses 4,778,334 0
Deferred income taxes (5,832,023) (9,970,207)
Stock-based compensation expense related to employee stock options, employee stock purchases and restricted stock 26,596,685 30,936,895
Impairment charge 8,376,148 0
Change in operating assets and liabilities:    
Accounts receivable, net (30,771,806) (34,528,140)
Inventories 35,148,302 (46,837,992)
Prepaid expenses and other (6,400,676) (2,616,370)
Accounts payable 52,627,156 (8,976,998)
Accrued liabilities, excluding dividends declared 2,040,885 19,229,845
Net cash provided by operating activities 461,627,573 343,817,752
Activity in investments:    
Sales proceeds 71,903,080 35,059,971
Maturities and calls 1,655,000 10,260,000
Purchases (16,267,120) (83,764,695)
Plant and equipment additions (103,418,837) (102,966,564)
Proceeds from sale of plant and equipment 259,111 142,400
Acquisition of businesses, net of cash acquired (156,291,615) 0
Loans to technology investment partners (14,199,157) 0
Increase in other assets (925,381) (5,614,129)
Net cash used for investing activities (217,284,919) (146,883,017)
CASH FLOWS USED FOR FINANCING ACTIVITIES:    
Issuance of common stock from stock plan transactions 13,338,052 24,024,353
Cash dividends paid (80,586,484) (83,145,216)
Repurchases of common stock (229,023,565) (184,609,148)
Net cash used for financing activities (296,271,997) (243,730,011)
NET DECREASE IN CASH, CASH EQUIVALENTS, and RESTRICTED CASH (51,929,343) (46,795,276)
CASH, CASH EQUIVALENTS, and RESTRICTED CASH, beginning of period 233,318,766 226,435,019
CASH, CASH EQUIVALENTS, and RESTRICTED CASH, end of period 181,389,423 179,639,743
Reconciliation of cash, cash equivalents and restricted cash to the Unaudited Condensed Consolidated Balance Sheets:    
Cash and cash equivalents 178,589,422  
Restricted cash included in Prepaid expenses and other 2,800,001  
Total cash, cash equivalents and restricted cash 181,389,423 179,639,743
Non-cash investing and financing activities:    
Change in property and equipment in accounts payable and accrued expenses and other current liabilities $ 12,433,422 $ (4,115,011)