Gentex (GNTX) 10-Q 5 Aug 21 2021 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2021	Jul. 23, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	0-10235
Entity Registrant Name	GENTEX CORPORATION
Entity Central Index Key	0000355811
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-2030505
Entity Address, Address Line One	600 N. Centennial
Entity Address, City or Town	Zeeland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49464
City Area Code	616
Local Phone Number	772-1800
Title of 12(b) Security	Common Stock, par value $0.06 per share
Trading Symbol	GNTX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		238,954,080

Unaudited Condensed Consolidate

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.

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Income - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
NET SALES		$ 428,005,026	$ 229,925,556	$ 911,729,865	$ 683,687,281
COST OF GOODS SOLD		276,408,285	185,980,748	576,832,956	483,154,994
Gross profit		151,596,741	43,944,808	334,896,909	200,532,287
OPERATING EXPENSES:
Engineering, research and development		29,059,058	28,992,968	56,711,139	58,608,390
Selling, general & administrative		22,613,062	21,690,096	44,527,448	43,634,987
Total operating expenses		51,672,120	50,683,064	101,238,587	102,243,377
Income (Loss) from operations		99,924,621	(6,738,256)	233,658,322	98,288,910
OTHER INCOME
Investment income		903,139	1,462,033	1,926,549	3,908,682
Other income, net		987,959	1,404,196	1,497,584	1,205,030
Total other income		1,891,098	2,866,229	3,424,133	5,113,712
INCOME (LOSS) BEFORE PROVISION FOR INCOME TAXES		101,815,719	(3,872,027)	237,082,455	103,402,622
PROVISION FOR (BENEFIT FROM) INCOME TAXES		15,309,301	(1,497,994)	37,125,167	16,270,854
NET INCOME (LOSS)		$ 86,506,418	$ (2,374,033)	$ 199,957,288	$ 87,131,768
EARNINGS (LOSS) PER SHARE:
Basic (in dollars per share)	[1]	$ 0.36	$ (0.01)	$ 0.83	$ 0.35
Diluted (in dollars per share)	[1]	0.36	(0.01)	0.82	0.35
Cash Dividends Declared per Share (in dollars per share)		$ 0.12	$ 0.120	$ 0.240	$ 0.24
[1]	(1) Earnings (Loss) Per Share has been adjusted to exclude the portion of net income (loss) allocated to participating securities as a result of share-based payment awards.

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (Loss)	$ 86,506,418	$ (2,374,033)	$ 199,957,288	$ 87,131,768
Other comprehensive income (loss) before tax:
Foreign currency translation adjustments	963,199	136,627	110,787	(555,463)
Unrealized gains (losses) on debt securities, net	1,705,281	3,022,561	(3,413,672)	5,802,291
Other comprehensive income (loss), before tax	2,668,480	3,159,188	(3,302,885)	5,246,828
Income tax impact related to components of other comprehensive income (loss)	358,109	634,738	(716,871)	1,218,481
Other comprehensive income (loss), net of tax	2,310,371	2,524,450	(2,586,014)	4,028,347
Comprehensive income	$ 88,816,789	$ 150,417	$ 197,371,274	$ 91,160,115

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Shareholders' Investment - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 1,960,980,714	$ 1,834,605,633	$ 1,963,943,128	[1]	$ 1,938,087,820
Issuance of common stock from stock plan transactions	4,391,044	8,355,204	$ 13,656,884		15,710,692
Issuance of common stock related to acquisitions		3,559,229			3,559,229
Repurchases of common stock (in shares)			(6,200,000)
Repurchases of common stock	(115,921,079)		$ (213,613,842)		(178,819,584)
Stock-based compensation expense related to stock options, employee stock purchases and restricted stock	6,727,513	5,430,583	12,622,158		11,786,653
Dividends declared	(28,675,992)	(29,493,653)	(57,660,613)		(58,877,512)
Net income (Loss)	86,506,418	(2,374,033)	199,957,288		87,131,768
Other comprehensive (loss) income	2,310,371	2,524,450	(2,586,014)		4,028,347
Balance at end of period	$ 1,916,318,989	$ 1,822,607,413	$ 1,916,318,989		$ 1,822,607,413
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	241,538,824	244,865,658	243,692,869		251,277,515
Balance at beginning of period	$ 14,492,329	$ 14,691,939	$ 14,621,572		$ 15,076,651
Issuance of common stock from stock plan transactions (in shares)	838,896	746,112	1,439,916		1,353,287
Issuance of common stock from stock plan transactions	$ 50,334	$ 44,767	$ 86,395		$ 81,198
Issuance of common stock related to acquisitions (in shares)		163,718			163,718
Issuance of common stock related to acquisitions		$ 9,823			$ 9,823
Repurchases of common stock (in shares)	(3,411,131)		(6,166,196)		(7,019,032)
Repurchases of common stock	$ (204,668)		$ (369,972)		$ (421,143)
Ending balance (in shares)	238,966,589	245,775,488	238,966,589		245,775,488
Balance at end of period	$ 14,337,995	$ 14,746,529	$ 14,337,995		$ 14,746,529
Additional  Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	859,355,232	801,388,454	852,771,508		807,928,139
Issuance of common stock from stock plan transactions	4,340,710	8,310,437	13,570,489		15,629,494
Issuance of common stock related to acquisitions		3,549,406			3,549,406
Repurchases of common stock	(10,745,063)		(19,285,763)		(20,214,812)
Stock-based compensation expense related to stock options, employee stock purchases and restricted stock	6,727,513	5,430,583	12,622,158		11,786,653
Balance at end of period	859,678,392	818,678,880	859,678,392		818,678,880
Retained  Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	1,085,178,486	1,018,310,446	1,089,698,996		1,116,372,133
Repurchases of common stock	(104,971,348)		(193,958,107)		(158,183,629)
Dividends declared	(28,675,992)	(29,493,653)	(57,660,613)		(58,877,512)
Net income (Loss)	86,506,418	(2,374,033)	199,957,288		87,131,768
Balance at end of period	1,038,037,564	986,442,760	1,038,037,564		986,442,760
Accumulated  Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	1,954,667	214,794	6,851,052		(1,289,103)
Other comprehensive (loss) income	2,310,371	2,524,450	(2,586,014)		4,028,347
Balance at end of period	$ 4,265,038	$ 2,739,244	$ 4,265,038		$ 2,739,244
[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.

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Shareholders' Investment (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared (in dollars per share)	$ 0.12	$ 0.120	$ 0.240	$ 0.24

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 199,957,288	$ 87,131,768
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,497,665	53,437,698
(Gain) on disposal of assets	(19,891)	(155,229)
Loss on disposal of assets	133,036	88,357
(Gain) on sale of investments	(969,971)	(1,023,683)
Loss on sale of investments	192,346	72,871
Change in deferred income taxes	(3,546,862)	(2,176,462)
Stock-based compensation expense related to employee stock options, employee stock purchases and restricted stock	12,622,158	15,960,362
Change in operating assets and liabilities:
Accounts receivable, net	50,784,339	64,981,864
Inventories	(37,608,133)	(10,710,548)
Prepaid expenses and other	(41,394,722)	14,230,026
Accounts payable	16,477,865	(37,452,944)
Accrued liabilities, excluding dividends declared and short-term debt	4,117,051	6,068,104
Net cash provided by operating activities	252,242,169	190,452,184
Activity in available-for-sale securities:
Sales proceeds	34,250,068	5,607,634
Maturities and calls	16,685,000	90,017,368
Purchases	(71,596,074)	(52,650,769)
Plant and equipment additions	(31,352,443)	(28,828,066)
Proceeds from sale of plant and equipment	99,850	200,475
Acquisition of businesses, net of cash acquired	(12,023,440)	(7,031,827)
Increase in other assets	(458,637)	(3,886,518)
Net cash (used for) provided by investing activities	(64,395,676)	3,428,297
CASH FLOWS (USED FOR) FINANCING ACTIVITIES:
Proceeds from borrowings on Credit Agreement	0	75,000,000
Issuance of common stock from stock plan transactions	13,656,884	15,710,692
Cash dividends paid	(58,227,768)	(58,281,727)
Repurchases of common stock	(213,613,842)	(178,819,584)
Net cash (used for) financing activities	(258,184,726)	(146,390,619)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(70,338,233)	47,489,862
CASH AND CASH EQUIVALENTS, beginning of period	423,371,036	296,321,622
CASH AND CASH EQUIVALENTS, end of period	$ 353,032,803	$ 343,811,484

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of PresentationThe unaudited condensed consolidated financial statements included herein have been prepared by the Company, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures are adequate to make the information presented not misleading. It is suggested that these unaudited condensed consolidated financial statements be read in conjunction with the financial statements and notes thereto included in the Company's 2020 annual report on Form 10-K. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting of only a normal and recurring nature, necessary to present fairly the financial position of the Company as of June 30, 2021, and the results of operations and cash flows for the interim periods presented.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the cost of an acquisition in excess of the fair values assigned to identifiable net assets acquired. The Company recorded Goodwill of $307.4 million as part of the HomeLink ® acquisition in 2013 and recorded an additional $3.7 million in Goodwill as part of the acquisition of Vaporsens, Inc. ("Vaporsens") that occurred in the second quarter of 2020 and an additional $0.9 million in Goodwill as a part of the acquisition of Argil, Inc. ("Argil") during the fourth quarter of 2020. The carrying value of Goodwill as of both June 30, 2021 and December 31, 2020 was $311.9 million as set forth in the table below: Carrying Amount Balance as of December 31, 2020 $ 311,922,787 Acquisitions — Divestitures — Impairments — Other — Balance as of June 30, 2021 $ 311,922,787 In addition to annual impairment testing, which is performed as of the first day of the fourth quarter, the Company continuously monitors for events and circumstances that could negatively impact the key assumptions in determining fair value of goodwill or other intangible assets thus resulting in the need for interim impairment testing, including long-term revenue growth projections, profitability, discount rates, recent market valuations from transactions by comparable companies, volatility in the Company's market capitalization, and general industry, market and macroeconomic conditions. The impact of COVID-19, the recent microchip shortage, supply chain constraints, and labor shortages were again considered in the most recently completed quarter, but did not indicate the need for interim impairment testing. The Company also acquired In-Process Research & Development as part of the acquisition of Vaporsens that occurred in the second quarter of 2020, the acquisition of Air-Craftglass Production BV ("Air-Craftglass") in the third quarter of 2020, and the acquisition of Argil in the fourth quarter of 2020, each of which has been previously disclosed. The Company also acquired Guardian Optical Technologies ("Guardian") in the first quarter of 2021. See Note 15 for more information on the Guardian transaction. The patents and intangible assets and related change in carrying values are set forth in the tables below: As of June 30, 2021: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 38,860,181 $ (25,402,803) $ 13,457,378 Various Vaporsens Technology Licenses 333,850 (58,232) 275,618 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (116,250,000) 63,750,000 12 years Existing Customer Platforms 43,000,000 (33,325,000) 9,675,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Vaporsens In-Process R&D 11,000,000 — 11,000,000 Indefinite Argil In- Process R&D 6,278,132 — 6,278,132 Indefinite Air-Craftglass In-Process R&D 1,250,000 — 1,250,000 Indefinite Guardian In-Process R&D 11,260,429 — 11,260,429 Indefinite Total Other Intangible Assets $ 400,788,561 $ (149,575,000) $ 251,213,561 Total Patents & Other Intangible Assets $ 439,982,592 $ (175,036,035) $ 264,946,557 As of December 31, 2020: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 38,625,292 $ (24,528,853) $ 14,096,439 Various Vaporsens Technology Licenses 300,985 (38,856) 262,129 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (108,750,000) 71,250,000 12 years Existing Customer Platforms 43,000,000 (31,175,000) 11,825,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Vaporsens In-Process R&D 11,000,000 — 11,000,000 Indefinite Argil In-Process R&D 6,278,132 — 6,278,132 Indefinite Air-Craftglass In-Process R&D 1,394,995 — 1,394,995 Indefinite Total Other Intangible Assets $ 389,673,127 $ (139,925,000) $ 249,748,127 Total Patents & Other Intangible Assets $ 428,599,404 $ (164,492,709) $ 264,106,695 Amortization expense on patents and intangible assets was approximately $5.6 million and $11.2 million during the three and six months ended June 30, 2021, respectively, compared to approximately $5.6 million and $11.2 million for the same periods ended June 30, 2020, respectively. Excluding the impact of any future acquisitions, the Company estimates amortization expense for each of the years ending December 31, 2021 and 2022 to be approximately $22 million annually, for the year ending December 31, 2023 to be approximately $19 million, for the year ending December 31, 2024 to be approximately $16 million , and for the year ending December 31, 2025 to be approximately $12 million

Investments

Investments	6 Months Ended
	Jun. 30, 2021
Investments [Abstract]
Investments	Investments The Company follows the provisions of Accounting Standards Codification ("ASC") 820, Fair Value Measurements and Disclosures , for its financial assets and liabilities, and for its non-financial assets and liabilities subject to fair value measurements. ASC 820 provides a framework for measuring the fair value of assets and liabilities. This framework is intended to provide increased consistency in how fair value determinations are made under various existing accounting standards that permit, or in some cases, require estimates of fair-market value. This standard also expanded financial statement disclosure requirements with respect to a company’s use of fair-value measurements, including the effect of such measurements on earnings. The cost of securities sold is based on the specific identification method. The Company determines the fair value of its government securities, asset-backed securities, municipal bonds, and corporate bonds by utilizing monthly valuation statements that are provided by its broker. The broker determines the investment valuation by utilizing the bid price in the market and also refers to third party sources to validate valuations, and as such are classified as Level 2 assets. The Company's certificates of deposit are classified as available for sale and are considered as Level 1 assets. These investments are carried at cost, which approximates fair value. The Company also periodically makes technology investments in certain non-consolidated third-parties. These equity investments are accounted for in accordance with ASC 321, Investments - Equity Securities . Equity investments that do not have readily determinable fair values, and where the Company has not identified any observable events that would cause adjustment of the valuation to date, are then held at cost. These technology investments totaled approximately $9.0 million and $4.0 million as of June 30, 2021 and December 31, 2020, respectively. These investments are classified within Long-Term Investments in the consolidated balance sheets. Assets or liabilities that have recurring fair value measurements are shown below as of June 30, 2021 and December 31, 2020: As of June 30, 2021: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description June 30, 2021 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 353,032,803 $ 353,032,803 $ — $ — Short-Term Investments: Certificate of Deposit 1,511,377 1,511,377 — — Corporate Bonds 2,020,280 — 2,020,280 — Government Securities 602,016 — 602,016 — Municipal Bonds 7,951,512 — 7,951,512 — Other 1,713,642 1,713,642 — — Long-Term Investments: Asset Backed Securities 29,174,900 — 29,174,900 — Certificate of Deposit 2,599,960 2,599,960 — — Corporate Bonds 27,966,498 — 27,966,498 — Government Securities 35,738,826 — 35,738,826 — Municipal Bonds 88,934,125 — 88,934,125 — Total $ 551,245,939 $ 358,857,782 $ 192,388,157 $ — As of December 31, 2020: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description December 31, 2020 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 423,371,036 $ 423,371,036 $ — $ — Short-Term Investments: Certificate of Deposit 1,516,693 1,516,693 — — Corporate Bonds 7,155,600 — 7,155,600 — Government Securities 6,678,450 — 6,678,450 — Municipal Bonds 10,284,765 — 10,284,765 — Other 1,528,861 1,528,861 — — Long-Term Investments: Asset-backed Securities 37,924,537 — 37,924,537 — Certificate of Deposit 3,645,520 3,645,520 — Corporate Bonds 9,024,035 — 9,024,035 — Municipal Bonds 107,407,831 — 107,407,831 — Total $ 608,537,328 $ 430,062,110 $ 178,475,218 $ — The amortized cost, unrealized gains and losses, and market value of investment securities are shown as of June 30, 2021 and December 31, 2020: As of June 30, 2021: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 1,502,822 $ 10,107 $ (1,552) $ 1,511,377 Corporate Bonds 2,013,237 7,043 — 2,020,280 Government Securities 601,784 232 — 602,016 Municipal Bonds 7,926,891 24,621 — 7,951,512 Other 1,713,642 — — 1,713,642 Long-Term Investments: Asset Backed Securities 29,690,643 69,718 (585,461) 29,174,900 Certificate of Deposit 2,502,449 97,511 — 2,599,960 Corporate Bonds 27,724,234 362,001 (119,737) 27,966,498 Government Securities 35,656,412 90,333 (7,919) 35,738,826 Municipal Bonds 84,595,949 6,309,593 (1,971,417) 88,934,125 Total $ 193,928,063 $ 6,971,159 $ (2,686,086) $ 198,213,136 As of December 31, 2020: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 1,502,187 $ 14,506 $ — $ 1,516,693 Corporate Bonds 7,084,638 70,962 — 7,155,600 Government Securities 6,635,132 43,318 — 6,678,450 Municipal Bonds 10,160,376 124,389 — 10,284,765 Other 1,528,861 — — 1,528,861 Long-Term Investments: Asset-backed Securities 37,681,113 800,802 (557,378) 37,924,537 Certificate of Deposit 3,503,898 141,622 — 3,645,520 Corporate Bonds 8,595,020 429,015 — 9,024,035 Municipal Bonds 100,776,325 6,635,428 (3,922) 107,407,831 Total $ 177,467,550 $ 8,260,042 $ (561,300) $ 185,166,292 Unrealized losses on investments as of June 30, 2021, are as follows: Aggregate Unrealized Losses Aggregate Fair Value of Investments Loss duration of less than one year $ 2,274,743 $ 40,341,064 Loss duration of greater than one year 411,342 1,956,482 Total $ 2,686,085 $ 42,297,546 Unrealized losses on investments as of December 31, 2020, are as follows: Aggregate Unrealized Losses Aggregate Fair Value of Investments Loss duration of less than one year $ 561,300 $ 12,317,187 Loss duration of greater than one year — — Total $ 561,300 $ 12,317,187 Effective January 1, 2020, the Company adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instrument s. The guidance modifies the impairment model for available-for-sale debt securities and provides a simplified accounting model for purchased financial assets with credit deterioration since their origination. The Company utilized the guidance provided by ASC 326 to determine whether any of the available-for-sale debt securities held by the Company were impaired. No investments were considered to be impaired during the periods presented. The Company has the intention and current ability to hold its debt investments until the amortized cost basis has been recovered. Fixed income securities as of June 30, 2021 have contractual maturities as follows: Due within one year $ 12,085,185 Due between one and five years 42,578,597 Due over five years 141,835,712 $ 196,499,494

Inventories

Inventories	6 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following at the respective balance sheet dates: June 30, 2021 December 31, 2020 Raw materials $ 179,304,938 $ 151,688,455 Work-in-process 35,083,146 32,791,675 Finished goods 49,511,892 41,811,713 Total Inventory $ 263,899,976 $ 226,291,843

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The Company has unvested share-based payment awards with a right to receive non-forfeitable dividends, which are considered participating securities under ASC 260, Earnings Per Share . The Company allocates earnings to participating securities and computes earnings per share using the two-class method. Under the two-class method, net income per share is computed by dividing net income allocated to common shareholders by the weighted average number of common shares outstanding for the period. In applying the two-class method, net income is allocated to both common shares and participating securities based on their respective weighted average shares outstanding for the period. For a period of net loss, net loss is not allocated to participating securities. The following table sets forth the computation of basic and diluted net income per common share under the two-class method for the three and six months ended June 30, 2021 and June 30, 2020 respectively: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Basic Earnings (Loss) Per Share Net Income (Loss) $ 86,506,418 $ (2,374,033) $ 199,957,288 $ 87,131,768 Less: Dividends and undistributed earnings allocated to participating securities 1,324,767 439,327 2,974,367 1,245,275 Net Income (Loss) available to common shareholders $ 85,181,651 $ (2,813,360) $ 196,982,921 $ 85,886,493 Basic weighted average shares outstanding 238,602,197 241,684,323 238,198,668 243,983,276 Net Income (Loss) per share - Basic $ 0.36 $ (0.01) $ 0.83 $ 0.35 Diluted Earnings (Loss) Per Share Allocation of Net Income (Loss) used in basic computation $ 85,181,651 $ (2,813,360) $ 196,982,921 $ 85,886,493 Reallocation of undistributed earnings 3,980 — 10,464 1,697 Net Income (Loss) available to common shareholders - Diluted $ 85,185,631 $ (2,813,360) $ 196,993,385 $ 85,888,190 Number of shares used in basic computation 238,602,197 241,684,323 238,198,668 243,983,276 Additional weighted average dilutive common stock equivalents 1,130,301 — 1,218,528 1,085,380 Diluted weighted average shares outstanding 239,732,498 241,684,323 239,417,196 245,068,656 Net Income (Loss) per share - Diluted $ 0.36 $ (0.01) $ 0.82 $ 0.35 Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive 270,475 1,636,661 137,484 428,948

Stock-Based Compensation Plans

Stock-Based Compensation Plans	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans As of June 30, 2021, the Company had two equity incentive plans, which include the Gentex Corporation 2019 Omnibus Incentive Plan ("2019 Omnibus Plan"), and an employee stock purchase plan. Those plans and any prior material amendments thereto have previously been approved by shareholders. The 2019 Omnibus Plan provides for the potential awards to: i) employees; and ii) non-employee directors of the Company or its subsidiaries, which potential awards may be stock options (both incentive stock options and non-qualified stock options), appreciation rights, restricted stock, restricted stock units, performance share awards and performance units, and other awards that are stock-based, cash-based or a combination of both. The 2019 Omnibus Plan replaced the Company's Employee Stock Option Plan, Second Restricted Stock Plan, and Amended and Restated Non-Employee Director Stock Option Plan (the "Prior Plans"), which were also approved by shareholders. Any existing awards previously granted under the Prior Plans remain outstanding in accordance with their terms and are governed by the Prior Plans as applicable. Readers should refer to Note 5 of the consolidated financial statements in the Company's Annual Report on Form 10-K for the calendar year ended December 31, 2020, for additional information related to the Prior Plans. The Company recognized total compensation expense for share-based payments of $6,727,513 for the three months ended June 30, 2021, and total compensation expense for share-based payments of $12,622,158 for the six months ended June 30, 2021. The Company recognized compensation expense for share-based payments of $9,641,353 and $15,960,362 for the three and six months ended June 30, 2020, respectively. A portion of the compensation cost for share based payment awards is capitalized as part of inventory. 2019 Omnibus Incentive Plan The purpose of the 2019 Omnibus Incentive Plan is to attract and retain employees, officers, and directors of the Company and its subsidiaries and to motivate and provide such persons incentives and rewards for performance. Pursuant to the terms of the Plan, each type of award counts against the available shares based on a predetermined conversion rate (shown in the table below). As of June 30, 2021, 5,735,302 share awards have been granted under the Plan. resulting in 14,332,742 shares, of 45,000,000 total shares available, to be issued under the Plan. The shares issued are presented net of shares from canceled/expired options and shares. Shares Granted Conversion Rate Total Shares Under 2019 Omnibus Plan Non-Qualified Stock Options 2,925,681 1.00 2,925,681 Restricted Stock / Performance Shares 2,809,621 4.06 11,407,061 Total 5,735,302 14,332,742 Employee Stock Options Under the 2019 Omnibus Plan and the Employee Stock Option Plan, the option exercise price equals the stock’s market price on the date of grant. The options vest after one five The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the indicated periods: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Dividend Yield (1) 1.86 % 1.99 % 1.88 % 2.01 % Expected volatility (2) 27.68 % 27.91 % 27.76 % 27.21 % Risk-free interest rate (3) 0.87 % 0.29 % 0.90 % 0.33 % Expected term of options (years) (4) 4.15 4.16 4.15 4.16 Weighted-avg. grant date fair value $6.32 $4.67 $6.58 $4.24 1. Represents the Company’s estimated cash dividend yield over the expected term of option grant. 2. Amount is determined based on analysis of historical price volatility of the Company’s common stock. The expected volatility is based on the daily percentage change in the price of the stock over a period equal to the expected term of the option grant. 3. Represents the U.S. Treasury yield over the expected term of the option grant. 4. Represents the period of time that options granted are expected to be outstanding. Based on analysis of historical option exercise activity, the Company has determined that all employee groups exhibit similar exercise and post-vesting termination behavior. Restricted Shares Restricted shares awarded under the 2019 Omnibus Plan and the Second Restricted Stock Plan entitle the shareholder to all rights of common stock ownership except that the shares may not be sold, transferred, pledged, exchanged or otherwise disposed of during the restriction period. The restriction period is determined by the Compensation Committee, appointed by the Board of Directors, but may not exceed ten years under the terms of such plans. As of June 30, 2021, the Company had unearned stock-based compensation of $50,874,177 associated with the restricted stock grants issued under the 2019 Omnibus Plan and the prior plan. The unearned stock-based compensation related to these grants is being amortized to compensation expense over the applicable restriction periods. Amortization expense from restricted stock in the three months ended June 30, 2021 was $4,459,401 and amortization expense from restricted stock grants in the six months ended June 30, 2021 was $8,762,376. . Amortization expense from restricted stock grants for the three and six months ended June 30, 2020 was $7,580,492 and $11,905,749, respectively, which included $4,148,477 of severance related expense for the second quarter of 2020. Performance Shares Performance shares awarded under the 2019 Omnibus Plan are considered performance condition awards as attainment is based on the Company's performance relative to pre-established metrics. The fair value of such performance share awards was determined using the Company's average closing stock price on the twenty days preceding the date of grant. The expected attainment of the metrics for these awards is then analyzed each reporting period, and the related expense is adjusted based on expected attainment, if the then expected attainment differs from previous expectations. The cumulative effect on current and prior periods of a change in expected attainment is recognized in the period of change. As of June 30, 2021, the Company had unearned stock-based compensation of $9,456,469 associated with these performance share grants. The unearned stock-based compensation related to these grants is being amortized to compensation expense over the applicable performance periods. Amortization expense from performance share grants in the three and six months ended June 30, 2021 was $701,524 and $805,754, respectively. Amortization expense from performance share grants in the three and six months ended June 30, 2020 was $563,783 and $957,560, respectively. Employee Stock Purchase Plan The Company has an employee stock purchase plan covering 2,000,000 shares of common stock. Under the plan, the Company sells shares at 85% of the stock’s market price at date of purchase. Under ASC 718, Compensation - Stock Compensation , the 15% discounted value is recognized as compensation expense. As of June 30, 2021, the Company has issued 1,423,819 shares under this plan.

Comprehensive Income

Comprehensive Income	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Comprehensive Income	Comprehensive Income Comprehensive income reflects the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. For the Company, comprehensive income represents net income adjusted for unrealized gains and losses on certain debt investments and foreign currency translation adjustments. The following table presents the net changes in the Company's accumulated other comprehensive income by component (all amounts shown are net of tax): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Foreign currency translation adjustments: Balance at beginning of period $ (83,367) $ (3,076,679) $ 769,045 $ (2,384,589) Other Comprehensive income (loss) before reclassifications 963,199 136,627 110,787 (555,463) Net current-period change 963,199 136,627 110,787 (555,463) Balance at end of period 879,832 (2,940,052) 879,832 (2,940,052) Unrealized gains on available-for-sale debt securities: Balance at beginning of period 2,038,034 3,291,473 6,082,007 1,095,486 Other Comprehensive income (loss) before reclassifications 1,610,141 3,109,755 (2,082,477) 5,334,951 Amounts reclassified from accumulated other comprehensive income (262,969) (721,932) (614,324) (751,141) Net current-period change 1,347,172 2,387,823 (2,696,801) 4,583,810 Balance at end of period 3,385,206 5,679,296 3,385,206 5,679,296 Accumulated other comprehensive income, end of period $ 4,265,038 $ 2,739,244 $ 4,265,038 $ 2,739,244 The following table presents details of reclassifications out of accumulated other comprehensive income for the three and six months ended June 30, 2021 and 2020: Details about Accumulated Other Comprehensive Income Components Amounts Reclassified from Other Comprehensive Income Affected Line item in the Statement of Consolidated Income Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Unrealized gains on available-for-sale debt securities Realized gain on sale $ 332,872 $ 913,838 $ 777,625 $ 950,812 Investment income Provision for income taxes (69,903) (191,906) (163,301) (199,671) Provision for (Benefit from) income taxes Total net reclassifications for the period $ 262,969 $ 721,932 $ 614,324 $ 751,141 Net of tax

Debt and Financing Arrangements

Debt and Financing Arrangements	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Debt and Financing Arrangements	Debt and Financing Arrangements On October 15, 2018, the Company entered into a Credit Agreement (“Credit Agreement”) with PNC as the administrative agent and sole lender. Pursuant to this Credit Agreement, the Company has access to a $150 million senior revolving credit facility (“Revolver”). Under the terms of the Credit Agreement, the Company is entitled to further request an additional aggregate principal amount of up to $100 million, subject to the satisfaction of certain conditions. In addition, the Company is entitled to the benefit of swing loans from amounts otherwise available under the Revolver in the aggregate principal amount of up to $20 million and to request Letters of Credit from amounts otherwise available under the Revolver in the aggregate principle amount up to $20 million, both subject to certain conditions. The obligations of the Company under the Credit Agreement are not secured, but are subject to certain covenants. As of June 30, 2021, there was no outstanding balance on the Revolver. The Revolver expires on October 15, 2023. The Credit Agreement contains customary representations and warranties and certain covenants that place certain limitations on the Company. As of June 30, 2021, the Company is in compliance with its covenants under the Credit Agreement.

Equity

Equity	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Equity	Equity The decrease in common stock during the six months ended June 30, 2021, was primarily due to the repurchases of 6.2 million shares, partially offset by the issuance of 1.4 million shares of the Company’s common stock under the Company’s stock-based compensation plans. The total net decrease was 4.7 million shares. The Company recorded a cash dividend of $0.120 per share during the second quarter of 2021 as compared to a cash dividend of $0.120 per share during the second quarter of 2020. The second quarter 2021 dividend of $28.7 million was declared on June 7, 2021, and was paid on July 21, 2021.

Contingencies

Contingencies	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Contingencies	ContingenciesThe Company is periodically involved in legal proceedings, legal actions and claims arising in the normal course of business, including proceedings relating to product liability, intellectual property, safety and health, employment, regulatory, and other matters. Such matters are subject to many uncertainties and outcomes are not predictable. The Company does not believe, however, that at the current time any of these matters constitute material pending legal proceedings that will have a material adverse effect on the financial position or future results of operations or cash flows of the Company.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company's automotive segment develops and manufactures digital vision and connected car products and electronics, including: automatic-dimming rearview mirrors with and without electronic features; non-auto dimming rearview mirrors with and without electronic features; and other electronics. The Company also develops and manufactures variably dimming windows for the aerospace industry and fire protection products for the commercial construction industry. In 2020, the Company acquired Vaporsens, which specializes in nanofiber chemical sensing. These three non-automotive segments are combined into the "Other" segment as shown below. In first quarter of 2021, the Company acquired Guardian, which is combined in the Automotive Segment below. Further information in regards to the Guardian transaction is included in Note 15 of the financial statements. Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Revenue: Automotive Products $ 420,622,653 $ 222,067,846 $ 896,240,089 $ 661,923,434 Other 7,382,373 7,857,710 15,489,776 21,763,847 Total $ 428,005,026 $ 229,925,556 $ 911,729,865 $ 683,687,281 Income (Loss) from operations: Automotive Products $ 101,790,310 $ (6,054,235) $ 236,458,363 $ 94,721,308 Other (1,865,689) (684,021) (2,800,041) 3,567,602 Total $ 99,924,621 $ (6,738,256) $ 233,658,322 $ 98,288,910

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe effective tax rate was 15.7% in the six months ended June 30, 2021, consistent with the effective tax rate of 15.7% for the same period in 2020. Generally, effective tax rates for these periods differ from statutory federal income tax rates, due to provisions for state and local income taxes, permanent tax differences, and the foreign-derived intangible income tax deduction and research and development tax credits.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The following table shows the Company’s Automotive revenue and Other Products revenue disaggregated by geographical location for Automotive Products for the three and six month periods ended June 30,2021 and June 30, 2020: Three Months Ended June 30, Six Months Ended June 30, Revenue 2021 2020 2021 2020 Automotive Products U.S. $ 135,857,058 $ 55,849,461 $ 282,282,375 $ 191,431,379 Germany 58,935,672 23,866,009 128,350,856 96,651,733 Japan 54,160,515 37,333,947 108,064,110 88,470,880 Mexico 28,589,143 13,589,601 60,335,131 59,540,082 Other 143,080,265 91,428,828 317,207,617 225,829,360 Total Automotive Products $ 420,622,653 $ 222,067,846 $ 896,240,089 $ 661,923,434 Other Products (U.S.) 7,382,373 7,857,710 15,489,776 21,763,847 Total Revenue $ 428,005,026 $ 229,925,556 $ 911,729,865 $ 683,687,281 Revenue by geographic area may fluctuate based on many factors, including: exposure to local economic, political and labor conditions; a pandemic; unexpected changes in laws, regulations, trade or monetary or fiscal policy, including interest rates, foreign currency exchange rates and changes in the rate of inflation in the U.S. and other foreign countries; and tariffs, quotas, customs and other import or export restrictions and other trade barriers. The following table disaggregates the Company’s Automotive revenue and Other revenue by major source for the three and six month periods ended June 30, 2021 and June 30, 2020: Three Months Ended June 30, Six Months Ended June 30, Revenue 2021 2020 2021 2020 Automotive Segment Automotive Mirrors & Electronics $ 390,074,655 $ 210,600,540 $ 825,581,585 $ 611,685,854 HomeLink Modules* 30,547,998 11,467,306 70,658,504 50,237,580 Total Automotive Products $ 420,622,653 $ 222,067,846 $ 896,240,089 $ 661,923,434 Other Segment Fire Protection Products 6,319,662 4,837,540 12,123,820 11,006,291 Windows Products 1,062,711 3,020,170 3,365,956 10,757,557 Total Other $ 7,382,373 $ 7,857,710 $ 15,489,776 $ 21,763,848 *Excludes HomeLink revenue where HomeLink electronics are integrated into interior auto-dimming mirrors.

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	Leases The Company has operating leases for corporate offices, warehouses, vehicles, and other equipment, which are included within "Plant and Equipment - Net" section of the Condensed Consolidated Balance Sheets. The leases have remaining lease terms of 1 year to 5 years. The weighted average remaining lease term for operating leases as of June 30, 2021 was 2 years, with a weighted average discount rate of 1.1%. Future minimum lease payments for operating leases as of June 30, 2021 were as follows: Year ending December 31, 2021 (excluding the six months ended June 30, 2021) $ 774,897 2022 1,046,545 2023 430,533 2024 38,075 2025 6,369 Thereafter 127 Total future minimum lease payments 2,296,546 Less imputed interest (12,135) Total $ 2,284,411 Reported as of June 30, 2021 Accrued Liabilities $ 1,384,444 Other Non-Current Liabilities 899,967 Total $ 2,284,411

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisitions	Acquisitions On September 18, 2020, the Company acquired the stock of Air-Craftglass, a Belgian company specializing in research and development of transparent products for the aviation industry, for an initial payment of $1.1 million. The Company funded the acquisition with a cash payment from cash on hand. The transaction also included contingent consideration based on future revenues of Air-Craftglass. The Company is still in the process of verifying data and finalizing information related to the valuation and recording of identifiable intangible assets, deferred taxes, net working capital, contingent consideration liability, and the resulting effects on the amount of recorded goodwill. The Company expects to finalize these matters within the measurement period, which will remain open through the third quarter of 2021. Air-Craftglass is now a 100% owned subsidiary of the Company, and is classified within the “Other” segment. The assets acquired and liabilities assumed as a part of this stock purchase were recorded at fair value on the acquisition date. The Company accounted for the acquisition under the provisions of FASB ASC Topic 805, Business Combinations . There were no revenues of the business of Air-Craftglass which were included in the Company’s condensed consolidated statements of income and comprehensive income for the year to date period ended June 30, 2021. On December 14, 2020, the Company acquired the stock of Argil for $3.7 million, which was in addition to the previous $4.2 million cash equity investment by the Company in Argil. The Company funded the acquisition with a cash payment from cash on hand. Argil specializes in electrochromic technology and research and development, which the Company anticipates using to complement and expand its product offerings and leverage for manufacturing efficiencies. The Company is still in the process of verifying data and finalizing information related to the valuation and recording of identifiable intangible assets, deferred taxes, net working capital, and the resulting effects on the amount of recorded goodwill. The Company expects to finalize these matters within the measurement period, which is currently expected to remain open through the fourth quarter of 2021. Argil is now a 100% owned subsidiary of the Company, and has been classified within the “Automotive” segment. The assets acquired and liabilities assumed as part of this stock purchase were recorded at fair value on the acquisition date. The Company accounted for the acquisition under the provisions of FASB ASC Topic 805, Business Combinations . There were no revenues of the business of Argil which were included in the Company’s condensed consolidated statement of income and comprehensive income for the year to date period ended June 30, 2021. On March 3, 2021 the Company acquired Guardian for approximately $12.0 million. Guardian is an Israeli research and development company that specializes in in-cabin sensing technologies for the automotive industry. The Company funded the acquisition with a cash payment from cash on hand. The Company is still in the process of verifying data and finalizing information related to the valuation and recording of identifiable intangible assets, deferred taxes, net working capital, and the resulting effects on the amount of recorded goodwill. The Company expects to finalize these matters within the measurement period, which is currently expected to remain open through the fourth quarter of 2021. Guardian is now a 100% owned subsidiary of the Company, and is classified within the Automotive segment. The Company accounted for the acquisition under the provisions of FASB ASC Topic 805, Business Combinations . There were no revenues of the business of Guardian which were included in the Company’s condensed consolidated statement of income and comprehensive income for the year to date period ended June 30, 2021. The following table summarizes the fair values of the assets acquired, and the liabilities assumed, as of the acquisition date of March 3, 2021: Fair Value Current Assets $ 32,000 Personal Property 15,000 In-Process R&D 10,945,367 Deferred Tax Asset 1,049,073 Total Net Assets Acquired $ 12,041,440 Through June 30, 2021, the Company has incurred acquisition-related costs of approximately $350,000, which has been expensed as incurred in the "Selling, general & administrative" section of its Condensed Consolidated Income Statement.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The carrying value of Goodwill as of both June 30, 2021 and December 31, 2020 was $311.9 million as set forth in the table below: Carrying Amount Balance as of December 31, 2020 $ 311,922,787 Acquisitions — Divestitures — Impairments — Other — Balance as of June 30, 2021 $ 311,922,787
Schedule of Intangible Assets	The patents and intangible assets and related change in carrying values are set forth in the tables below: As of June 30, 2021: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 38,860,181 $ (25,402,803) $ 13,457,378 Various Vaporsens Technology Licenses 333,850 (58,232) 275,618 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (116,250,000) 63,750,000 12 years Existing Customer Platforms 43,000,000 (33,325,000) 9,675,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Vaporsens In-Process R&D 11,000,000 — 11,000,000 Indefinite Argil In- Process R&D 6,278,132 — 6,278,132 Indefinite Air-Craftglass In-Process R&D 1,250,000 — 1,250,000 Indefinite Guardian In-Process R&D 11,260,429 — 11,260,429 Indefinite Total Other Intangible Assets $ 400,788,561 $ (149,575,000) $ 251,213,561 Total Patents & Other Intangible Assets $ 439,982,592 $ (175,036,035) $ 264,946,557 As of December 31, 2020: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 38,625,292 $ (24,528,853) $ 14,096,439 Various Vaporsens Technology Licenses 300,985 (38,856) 262,129 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (108,750,000) 71,250,000 12 years Existing Customer Platforms 43,000,000 (31,175,000) 11,825,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Vaporsens In-Process R&D 11,000,000 — 11,000,000 Indefinite Argil In-Process R&D 6,278,132 — 6,278,132 Indefinite Air-Craftglass In-Process R&D 1,394,995 — 1,394,995 Indefinite Total Other Intangible Assets $ 389,673,127 $ (139,925,000) $ 249,748,127 Total Patents & Other Intangible Assets $ 428,599,404 $ (164,492,709) $ 264,106,695

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2021
Investments [Abstract]
Investment Securities Stated at Fair Value	Assets or liabilities that have recurring fair value measurements are shown below as of June 30, 2021 and December 31, 2020: As of June 30, 2021: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description June 30, 2021 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 353,032,803 $ 353,032,803 $ — $ — Short-Term Investments: Certificate of Deposit 1,511,377 1,511,377 — — Corporate Bonds 2,020,280 — 2,020,280 — Government Securities 602,016 — 602,016 — Municipal Bonds 7,951,512 — 7,951,512 — Other 1,713,642 1,713,642 — — Long-Term Investments: Asset Backed Securities 29,174,900 — 29,174,900 — Certificate of Deposit 2,599,960 2,599,960 — — Corporate Bonds 27,966,498 — 27,966,498 — Government Securities 35,738,826 — 35,738,826 — Municipal Bonds 88,934,125 — 88,934,125 — Total $ 551,245,939 $ 358,857,782 $ 192,388,157 $ — As of December 31, 2020: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description December 31, 2020 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 423,371,036 $ 423,371,036 $ — $ — Short-Term Investments: Certificate of Deposit 1,516,693 1,516,693 — — Corporate Bonds 7,155,600 — 7,155,600 — Government Securities 6,678,450 — 6,678,450 — Municipal Bonds 10,284,765 — 10,284,765 — Other 1,528,861 1,528,861 — — Long-Term Investments: Asset-backed Securities 37,924,537 — 37,924,537 — Certificate of Deposit 3,645,520 3,645,520 — Corporate Bonds 9,024,035 — 9,024,035 — Municipal Bonds 107,407,831 — 107,407,831 — Total $ 608,537,328 $ 430,062,110 $ 178,475,218 $ —
Schedule of Amortized Cost, Unrealized Gains And Losses, And Market Value of Investment Securities	The amortized cost, unrealized gains and losses, and market value of investment securities are shown as of June 30, 2021 and December 31, 2020: As of June 30, 2021: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 1,502,822 $ 10,107 $ (1,552) $ 1,511,377 Corporate Bonds 2,013,237 7,043 — 2,020,280 Government Securities 601,784 232 — 602,016 Municipal Bonds 7,926,891 24,621 — 7,951,512 Other 1,713,642 — — 1,713,642 Long-Term Investments: Asset Backed Securities 29,690,643 69,718 (585,461) 29,174,900 Certificate of Deposit 2,502,449 97,511 — 2,599,960 Corporate Bonds 27,724,234 362,001 (119,737) 27,966,498 Government Securities 35,656,412 90,333 (7,919) 35,738,826 Municipal Bonds 84,595,949 6,309,593 (1,971,417) 88,934,125 Total $ 193,928,063 $ 6,971,159 $ (2,686,086) $ 198,213,136 As of December 31, 2020: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 1,502,187 $ 14,506 $ — $ 1,516,693 Corporate Bonds 7,084,638 70,962 — 7,155,600 Government Securities 6,635,132 43,318 — 6,678,450 Municipal Bonds 10,160,376 124,389 — 10,284,765 Other 1,528,861 — — 1,528,861 Long-Term Investments: Asset-backed Securities 37,681,113 800,802 (557,378) 37,924,537 Certificate of Deposit 3,503,898 141,622 — 3,645,520 Corporate Bonds 8,595,020 429,015 — 9,024,035 Municipal Bonds 100,776,325 6,635,428 (3,922) 107,407,831 Total $ 177,467,550 $ 8,260,042 $ (561,300) $ 185,166,292
Schedule of Unrealized Loss on Investments	Unrealized losses on investments as of June 30, 2021, are as follows: Aggregate Unrealized Losses Aggregate Fair Value of Investments Loss duration of less than one year $ 2,274,743 $ 40,341,064 Loss duration of greater than one year 411,342 1,956,482 Total $ 2,686,085 $ 42,297,546 Unrealized losses on investments as of December 31, 2020, are as follows: Aggregate Unrealized Losses Aggregate Fair Value of Investments Loss duration of less than one year $ 561,300 $ 12,317,187 Loss duration of greater than one year — — Total $ 561,300 $ 12,317,187
Investments Classified by Contractual Maturity Date	Fixed income securities as of June 30, 2021 have contractual maturities as follows: Due within one year $ 12,085,185 Due between one and five years 42,578,597 Due over five years 141,835,712 $ 196,499,494

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following at the respective balance sheet dates: June 30, 2021 December 31, 2020 Raw materials $ 179,304,938 $ 151,688,455 Work-in-process 35,083,146 32,791,675 Finished goods 49,511,892 41,811,713 Total Inventory $ 263,899,976 $ 226,291,843

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Share Basic And Diluted	The following table sets forth the computation of basic and diluted net income per common share under the two-class method for the three and six months ended June 30, 2021 and June 30, 2020 respectively: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Basic Earnings (Loss) Per Share Net Income (Loss) $ 86,506,418 $ (2,374,033) $ 199,957,288 $ 87,131,768 Less: Dividends and undistributed earnings allocated to participating securities 1,324,767 439,327 2,974,367 1,245,275 Net Income (Loss) available to common shareholders $ 85,181,651 $ (2,813,360) $ 196,982,921 $ 85,886,493 Basic weighted average shares outstanding 238,602,197 241,684,323 238,198,668 243,983,276 Net Income (Loss) per share - Basic $ 0.36 $ (0.01) $ 0.83 $ 0.35 Diluted Earnings (Loss) Per Share Allocation of Net Income (Loss) used in basic computation $ 85,181,651 $ (2,813,360) $ 196,982,921 $ 85,886,493 Reallocation of undistributed earnings 3,980 — 10,464 1,697 Net Income (Loss) available to common shareholders - Diluted $ 85,185,631 $ (2,813,360) $ 196,993,385 $ 85,888,190 Number of shares used in basic computation 238,602,197 241,684,323 238,198,668 243,983,276 Additional weighted average dilutive common stock equivalents 1,130,301 — 1,218,528 1,085,380 Diluted weighted average shares outstanding 239,732,498 241,684,323 239,417,196 245,068,656 Net Income (Loss) per share - Diluted $ 0.36 $ (0.01) $ 0.82 $ 0.35 Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive 270,475 1,636,661 137,484 428,948

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Shares Issued, Net of Shares from Canceled/Expired Options and Shares	The shares issued are presented net of shares from canceled/expired options and shares. Shares Granted Conversion Rate Total Shares Under 2019 Omnibus Plan Non-Qualified Stock Options 2,925,681 1.00 2,925,681 Restricted Stock / Performance Shares 2,809,621 4.06 11,407,061 Total 5,735,302 14,332,742
Weighted-Average Assumptions For The Employee Stock Option Plan	The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the indicated periods: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Dividend Yield (1) 1.86 % 1.99 % 1.88 % 2.01 % Expected volatility (2) 27.68 % 27.91 % 27.76 % 27.21 % Risk-free interest rate (3) 0.87 % 0.29 % 0.90 % 0.33 % Expected term of options (years) (4) 4.15 4.16 4.15 4.16 Weighted-avg. grant date fair value $6.32 $4.67 $6.58 $4.24 1. Represents the Company’s estimated cash dividend yield over the expected term of option grant. 2. Amount is determined based on analysis of historical price volatility of the Company’s common stock. The expected volatility is based on the daily percentage change in the price of the stock over a period equal to the expected term of the option grant. 3. Represents the U.S. Treasury yield over the expected term of the option grant. 4. Represents the period of time that options granted are expected to be outstanding. Based on analysis of historical option exercise activity, the Company has determined that all employee groups exhibit similar exercise and post-vesting termination behavior.

Comprehensive Income (Tables)

Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Schedule of AOCI	The following table presents the net changes in the Company's accumulated other comprehensive income by component (all amounts shown are net of tax): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Foreign currency translation adjustments: Balance at beginning of period $ (83,367) $ (3,076,679) $ 769,045 $ (2,384,589) Other Comprehensive income (loss) before reclassifications 963,199 136,627 110,787 (555,463) Net current-period change 963,199 136,627 110,787 (555,463) Balance at end of period 879,832 (2,940,052) 879,832 (2,940,052) Unrealized gains on available-for-sale debt securities: Balance at beginning of period 2,038,034 3,291,473 6,082,007 1,095,486 Other Comprehensive income (loss) before reclassifications 1,610,141 3,109,755 (2,082,477) 5,334,951 Amounts reclassified from accumulated other comprehensive income (262,969) (721,932) (614,324) (751,141) Net current-period change 1,347,172 2,387,823 (2,696,801) 4,583,810 Balance at end of period 3,385,206 5,679,296 3,385,206 5,679,296 Accumulated other comprehensive income, end of period $ 4,265,038 $ 2,739,244 $ 4,265,038 $ 2,739,244
Reclassifications Out of Other Comprehensive Income	The following table presents details of reclassifications out of accumulated other comprehensive income for the three and six months ended June 30, 2021 and 2020: Details about Accumulated Other Comprehensive Income Components Amounts Reclassified from Other Comprehensive Income Affected Line item in the Statement of Consolidated Income Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Unrealized gains on available-for-sale debt securities Realized gain on sale $ 332,872 $ 913,838 $ 777,625 $ 950,812 Investment income Provision for income taxes (69,903) (191,906) (163,301) (199,671) Provision for (Benefit from) income taxes Total net reclassifications for the period $ 262,969 $ 721,932 $ 614,324 $ 751,141 Net of tax

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Schedule of Automotive and Other Segment Reporting	These three non-automotive segments are combined into the "Other" segment as shown below. In first quarter of 2021, the Company acquired Guardian, which is combined in the Automotive Segment below. Further information in regards to the Guardian transaction is included in Note 15 of the financial statements. Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Revenue: Automotive Products $ 420,622,653 $ 222,067,846 $ 896,240,089 $ 661,923,434 Other 7,382,373 7,857,710 15,489,776 21,763,847 Total $ 428,005,026 $ 229,925,556 $ 911,729,865 $ 683,687,281 Income (Loss) from operations: Automotive Products $ 101,790,310 $ (6,054,235) $ 236,458,363 $ 94,721,308 Other (1,865,689) (684,021) (2,800,041) 3,567,602 Total $ 99,924,621 $ (6,738,256) $ 233,658,322 $ 98,288,910

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table shows the Company’s Automotive revenue and Other Products revenue disaggregated by geographical location for Automotive Products for the three and six month periods ended June 30,2021 and June 30, 2020: Three Months Ended June 30, Six Months Ended June 30, Revenue 2021 2020 2021 2020 Automotive Products U.S. $ 135,857,058 $ 55,849,461 $ 282,282,375 $ 191,431,379 Germany 58,935,672 23,866,009 128,350,856 96,651,733 Japan 54,160,515 37,333,947 108,064,110 88,470,880 Mexico 28,589,143 13,589,601 60,335,131 59,540,082 Other 143,080,265 91,428,828 317,207,617 225,829,360 Total Automotive Products $ 420,622,653 $ 222,067,846 $ 896,240,089 $ 661,923,434 Other Products (U.S.) 7,382,373 7,857,710 15,489,776 21,763,847 Total Revenue $ 428,005,026 $ 229,925,556 $ 911,729,865 $ 683,687,281 The following table disaggregates the Company’s Automotive revenue and Other revenue by major source for the three and six month periods ended June 30, 2021 and June 30, 2020: Three Months Ended June 30, Six Months Ended June 30, Revenue 2021 2020 2021 2020 Automotive Segment Automotive Mirrors & Electronics $ 390,074,655 $ 210,600,540 $ 825,581,585 $ 611,685,854 HomeLink Modules* 30,547,998 11,467,306 70,658,504 50,237,580 Total Automotive Products $ 420,622,653 $ 222,067,846 $ 896,240,089 $ 661,923,434 Other Segment Fire Protection Products 6,319,662 4,837,540 12,123,820 11,006,291 Windows Products 1,062,711 3,020,170 3,365,956 10,757,557 Total Other $ 7,382,373 $ 7,857,710 $ 15,489,776 $ 21,763,848 *Excludes HomeLink revenue where HomeLink electronics are integrated into interior auto-dimming mirrors.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Future Minimum Lease Payments	Future minimum lease payments for operating leases as of June 30, 2021 were as follows: Year ending December 31, 2021 (excluding the six months ended June 30, 2021) $ 774,897 2022 1,046,545 2023 430,533 2024 38,075 2025 6,369 Thereafter 127 Total future minimum lease payments 2,296,546 Less imputed interest (12,135) Total $ 2,284,411
Lease Liabilities	Reported as of June 30, 2021 Accrued Liabilities $ 1,384,444 Other Non-Current Liabilities 899,967 Total $ 2,284,411

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired, and the liabilities assumed, as of the acquisition date of March 3, 2021: Fair Value Current Assets $ 32,000 Personal Property 15,000 In-Process R&D 10,945,367 Deferred Tax Asset 1,049,073 Total Net Assets Acquired $ 12,041,440

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020		Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 311,922,787	$ 311,922,787	[1]		$ 311,922,787
Acquisitions					0
Amortization of intangible assets	5,600,000			$ 5,600,000	11,200,000	$ 11,200,000
Amortization expense, remainder of fiscal year	22,000,000				22,000,000
Amortization expense, year one	22,000,000				22,000,000
Amortization expense, year two	19,000,000				19,000,000
Amortization expense, year three	16,000,000				16,000,000
Amortization expense, year four	$ 12,000,000				$ 12,000,000
HomeLink®
Finite-Lived Intangible Assets [Line Items]
Goodwill							$ 307,400,000
Vaporsens Inc
Finite-Lived Intangible Assets [Line Items]
Acquisitions				$ 3,700,000
Argil, Inc.
Finite-Lived Intangible Assets [Line Items]
Acquisitions		$ 900,000
[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.

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details)	6 Months Ended
	Jun. 30, 2021USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2020	$ 311,922,787	[1]
Acquisitions	0
Divestitures	0
Impairments	0
Other	0
Balance as of June 30, 2021	$ 311,922,787
[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.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, accumulated amortization	$ (149,575,000)	$ (139,925,000)
Intangible assets, gross	400,788,561	389,673,127
Intangible assets, net	251,213,561	249,748,127	[1]
Patents and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, accumulated amortization	(175,036,035)	(164,492,709)
Intangible assets, gross	439,982,592	428,599,404
Intangible assets, net	264,946,557	264,106,695
Gentex Patents
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	38,860,181	38,625,292
Finite-lived intangible assets, accumulated amortization	(25,402,803)	(24,528,853)
Finite-lived intangible assets, net	13,457,378	14,096,439
Vaporsens Technology Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	333,850	300,985
Finite-lived intangible assets, accumulated amortization	(58,232)	(38,856)
Finite-lived intangible assets, net	275,618	262,129
HomeLink® Technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	180,000,000	180,000,000
Finite-lived intangible assets, accumulated amortization	(116,250,000)	(108,750,000)
Finite-lived intangible assets, net	$ 63,750,000	$ 71,250,000
Finite-lived intangible asset, useful life	12 years	12 years
Existing Customer Platforms
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 43,000,000	$ 43,000,000
Finite-lived intangible assets, accumulated amortization	(33,325,000)	(31,175,000)
Finite-lived intangible assets, net	$ 9,675,000	$ 11,825,000
Finite-lived intangible asset, useful life	10 years	10 years
HomeLink® Trade Names and Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 52,000,000	$ 52,000,000
Exclusive Licensing Agreement
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	96,000,000	96,000,000
In-Process R&D | Vaporsens Inc
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	11,000,000	11,000,000
In-Process R&D | Argil, Inc.
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	6,278,132	6,278,132
In-Process R&D | Air-CraftGlass
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	1,250,000	$ 1,394,995
In-Process R&D | Guardian Optical Technologies
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 11,260,429
[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.

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Technology investments	$ 9,000,000	$ 4,000,000
Equity investment losses were considered to be other than temporary	$ 0	$ 0

Investments (Schedule of Assets

Investments (Schedule of Assets or Liabilities, Recurring Fair Value Measurements) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	$ 353,032,803	$ 423,371,036
Market Value	198,213,136	185,166,292
Total	551,245,939	608,537,328
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	353,032,803	423,371,036
Total	358,857,782	430,062,110
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	0	0
Total	192,388,157	178,475,218
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	0	0
Total	0	0
Short-Term Investments | Certificate of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	1,511,377	1,516,693
Short-Term Investments | Certificate of Deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	1,511,377	1,516,693
Short-Term Investments | Certificate of Deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Certificate of Deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	2,020,280	7,155,600
Short-Term Investments | Corporate Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	2,020,280	7,155,600
Short-Term Investments | Corporate Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	602,016	6,678,450
Short-Term Investments | Government Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Government Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	602,016	6,678,450
Short-Term Investments | Government Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Municipal Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	7,951,512	10,284,765
Short-Term Investments | Municipal Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Municipal Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	7,951,512	10,284,765
Short-Term Investments | Municipal Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	1,713,642	1,528,861
Short-Term Investments | Other | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	1,713,642	1,528,861
Short-Term Investments | Other | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Other | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Asset Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	29,174,900	37,924,537
Long-Term Investments | Asset Backed Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Asset Backed Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	29,174,900	37,924,537
Long-Term Investments | Asset Backed Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Certificate of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	2,599,960	3,645,520
Long-Term Investments | Certificate of Deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	2,599,960	3,645,520
Long-Term Investments | Certificate of Deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0
Long-Term Investments | Certificate of Deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	27,966,498	9,024,035
Long-Term Investments | Corporate Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	27,966,498	9,024,035
Long-Term Investments | Corporate Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	35,738,826
Long-Term Investments | Government Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0
Long-Term Investments | Government Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	35,738,826
Long-Term Investments | Government Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0
Long-Term Investments | Municipal Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	88,934,125	107,407,831
Long-Term Investments | Municipal Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Municipal Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	88,934,125	107,407,831
Long-Term Investments | Municipal Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	$ 0	$ 0

Investments (Schedule of Amorti

Investments (Schedule of Amortized Cost, Unrealized Gains and Losses, and Market Value of Investment Securities) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Cost	$ 193,928,063	$ 177,467,550
Unrealized Gains	6,971,159	8,260,042
Unrealized Losses	(2,686,086)	(561,300)
Market Value	198,213,136	185,166,292
Short-Term Investments | Certificate of Deposit
Debt Securities, Available-for-sale [Line Items]
Cost	1,502,822	1,502,187
Unrealized Gains	10,107	14,506
Unrealized Losses	(1,552)	0
Market Value	1,511,377	1,516,693
Short-Term Investments | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	2,013,237	7,084,638
Unrealized Gains	7,043	70,962
Unrealized Losses	0	0
Market Value	2,020,280	7,155,600
Short-Term Investments | Government Securities
Debt Securities, Available-for-sale [Line Items]
Cost	601,784	6,635,132
Unrealized Gains	232	43,318
Unrealized Losses	0	0
Market Value	602,016	6,678,450
Short-Term Investments | Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	7,926,891	10,160,376
Unrealized Gains	24,621	124,389
Unrealized Losses	0	0
Market Value	7,951,512	10,284,765
Short-Term Investments | Other
Debt Securities, Available-for-sale [Line Items]
Cost	1,713,642	1,528,861
Unrealized Gains	0	0
Unrealized Losses	0	0
Market Value	1,713,642	1,528,861
Long-Term Investments | Asset Backed Securities
Debt Securities, Available-for-sale [Line Items]
Cost	29,690,643	37,681,113
Unrealized Gains	69,718	800,802
Unrealized Losses	(585,461)	(557,378)
Market Value	29,174,900	37,924,537
Long-Term Investments | Certificate of Deposit
Debt Securities, Available-for-sale [Line Items]
Cost	2,502,449	3,503,898
Unrealized Gains	97,511	141,622
Unrealized Losses	0	0
Market Value	2,599,960	3,645,520
Long-Term Investments | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	27,724,234	8,595,020
Unrealized Gains	362,001	429,015
Unrealized Losses	(119,737)	0
Market Value	27,966,498	9,024,035
Long-Term Investments | Government Securities
Debt Securities, Available-for-sale [Line Items]
Cost	35,656,412
Unrealized Gains	90,333
Unrealized Losses	(7,919)
Market Value	35,738,826
Long-Term Investments | Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	84,595,949	100,776,325
Unrealized Gains	6,309,593	6,635,428
Unrealized Losses	(1,971,417)	(3,922)
Market Value	$ 88,934,125	$ 107,407,831

Investments (Schedule of Unreal

Investments (Schedule of Unrealized Loss on Investments) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Investments [Abstract]
Aggregate Unrealized Losses, Loss duration less than one year	$ 2,274,743	$ 561,300
Aggregate Unrealized Losses, Loss duration greater than one year	411,342	0
Aggregate Unrealized Losses, Total	2,686,085	561,300
Aggregate Fair Value of Investments, Loss duration less than one year	40,341,064	12,317,187
Aggregate Fair Value of Investments, Loss duration greater than one year	1,956,482	0
Aggregate Fair Value of Investments, Total	$ 42,297,546	$ 12,317,187

Investments (Investments Classi

Investments (Investments Classified by Contractual Maturity Date) (Details) - Fixed Income Securities	Jun. 30, 2021USD ($)
Debt Securities, Available-for-sale [Line Items]
Due within one year	$ 12,085,185
Due between one and five years	42,578,597
Due over five years	141,835,712
Total	$ 196,499,494

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 179,304,938	$ 151,688,455
Work-in-process	35,083,146	32,791,675
Finished goods	49,511,892	41,811,713
Total Inventory	$ 263,899,976	$ 226,291,843	[1]
[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.

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic Earnings (Loss) Per Share
Net income (Loss)		$ 86,506,418	$ (2,374,033)	$ 199,957,288	$ 87,131,768
Less: Dividends and undistributed earnings allocated to participating securities		1,324,767	439,327	2,974,367	1,245,275
Net Income (Loss) available to common shareholders		$ 85,181,651	$ (2,813,360)	$ 196,982,921	$ 85,886,493
Basic weighted average shares outstanding		238,602,197	241,684,323	238,198,668	243,983,276
Net (Loss) Income per share - Basic (in dollars per share)	[1]	$ 0.36	$ (0.01)	$ 0.83	$ 0.35
Diluted Earnings (Loss) Per Share
Allocation of Net Income (Loss) used in basic computation		$ 85,181,651	$ (2,813,360)	$ 196,982,921	$ 85,886,493
Reallocation of undistributed earnings		3,980	0	10,464	1,697
Net Income (Loss) available to common shareholders - Diluted		$ 85,185,631	$ (2,813,360)	$ 196,993,385	$ 85,888,190
Number of shares used in basic computation		238,602,197	241,684,323	238,198,668	243,983,276
Additional weighted average dilutive common stock equivalents (in shares)		1,130,301	0	1,218,528	1,085,380
Diluted weighted average shares outstanding		239,732,498	241,684,323	239,417,196	245,068,656
Net Income (Loss) per share - Diluted (in dollars per share)	[1]	$ 0.36	$ (0.01)	$ 0.82	$ 0.35
Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive		270,475	1,636,661	137,484	428,948
[1]	(1) Earnings (Loss) Per Share has been adjusted to exclude the portion of net income (loss) allocated to participating securities as a result of share-based payment awards.

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)planshares	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)planshares	Jun. 30, 2020USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for share-based payments	$ 6,727,513	$ 9,641,353	$ 12,622,158	$ 15,960,362
Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total grants in period (in shares) | shares			5,735,302
Shares issued under the Omnibus plan | shares			14,332,742
Number of shares authorized | shares	45,000,000		45,000,000
Employee Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 8,999,790		$ 8,999,790
Employee Stock Option Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			1 year
Option expiration period			5 years
Employee Stock Option Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			5 years
Option expiration period			10 years
Restricted Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	50,874,177		$ 50,874,177
Restricted period, maximum			10 years
Amortization expense	$ 4,459,401	7,580,492	$ 8,762,376	11,905,749
Restricted Stock Plan | Employee Severance
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization expense		4,148,477
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved | shares	2,000,000		2,000,000
ESPP discount rate			85.00%
ESPP discount rate recognized as compensation expense			15.00%
Shares granted (in shares) | shares	1,423,819		1,423,819
Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans | plan	2		2
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 9,456,469		$ 9,456,469
Amortization expense	$ 701,524	$ 563,783	$ 805,754	$ 957,560

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Shares Issued Net of Shares Canceled/Expired) (Details) - Omnibus Incentive Plan	6 Months Ended
	Jun. 30, 2021shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total grants in period (in shares)	5,735,302
Shares issued under the Omnibus plan	14,332,742
Non-Qualified Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	2,925,681
Conversion rate, options	100.00%
Shares issued under the Omnibus plan	2,925,681
Restricted Stock and Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	2,809,621
Conversion rate, shares	406.00%
Shares issued under the Omnibus plan	11,407,061

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans (Weighted-Average Assumptions for the ESOP) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Payment Arrangement [Abstract]
Dividend yield	1.86%	1.99%	1.88%	2.01%
Expected volatility	27.68%	27.91%	27.76%	27.21%
Risk-free interest rate	0.87%	0.29%	0.90%	0.33%
Expected term of options	4 years 1 month 24 days	4 years 1 month 28 days	4 years 1 month 24 days	4 years 1 month 28 days
Weighted average grant-date fair value (in dollars per share)	$ 6.32	$ 4.67	$ 6.58	$ 4.24

Comprehensive Income (AOCI Roll

Comprehensive Income (AOCI Rollforward) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020	Dec. 31, 2020	[1]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,960,980,714	$ 1,834,605,633	$ 1,963,943,128	[1]	$ 1,938,087,820
Net current-period change	2,310,371	2,524,450	(2,586,014)		4,028,347
Balance at end of period	1,916,318,989	1,822,607,413	1,916,318,989		1,822,607,413
Accumulated other comprehensive income, end of period	4,265,038		4,265,038			$ 6,851,052
Accumulated  Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	1,954,667	214,794	6,851,052		(1,289,103)
Net current-period change	2,310,371	2,524,450	(2,586,014)		4,028,347
Balance at end of period	4,265,038	2,739,244	4,265,038		2,739,244
Accumulated other comprehensive income, end of period	4,265,038	2,739,244	4,265,038		2,739,244
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(83,367)	(3,076,679)	769,045		(2,384,589)
Other Comprehensive income (loss) before reclassifications	963,199	136,627	110,787		(555,463)
Net current-period change	963,199	136,627	110,787		(555,463)
Balance at end of period	879,832	(2,940,052)	879,832		(2,940,052)
Unrealized gains (losses) on available-for-sale debt securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	2,038,034	3,291,473	6,082,007		1,095,486
Other Comprehensive income (loss) before reclassifications	1,610,141	3,109,755	(2,082,477)		5,334,951
Amounts reclassified from accumulated other comprehensive income	(262,969)	(721,932)	(614,324)		(751,141)
Net current-period change	1,347,172	2,387,823	(2,696,801)		4,583,810
Balance at end of period	$ 3,385,206	$ 5,679,296	$ 3,385,206		$ 5,679,296
[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.

Comprehensive Income (Reclassif

Comprehensive Income (Reclassification Out of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	$ (15,309,301)	$ 1,497,994	$ (37,125,167)	$ (16,270,854)
Unrealized gains (losses) on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Total net reclassifications for the period	262,969	721,932	614,324	751,141
Amounts Reclassified from Other Comprehensive Income | Unrealized gains (losses) on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Realized gain on sale of securities	332,872	913,838	777,625	950,812
Provision for income taxes	(69,903)	(191,906)	(163,301)	(199,671)
Total net reclassifications for the period	$ 262,969	$ 721,932	$ 614,324	$ 751,141

Debt and Financing Arrangemen_2

Debt and Financing Arrangements (Details) - USD ($)	Jun. 30, 2021	Oct. 15, 2018
Revolving Facility
Debt Instrument [Line Items]
Principal amount		$ 150,000,000
Long-term debt	$ 0
Credit Agreement
Debt Instrument [Line Items]
Additional borrowings available		100,000,000
Swing Loans
Debt Instrument [Line Items]
Additional borrowings available		20,000,000
Letter of Credit
Debt Instrument [Line Items]
Additional borrowings available		$ 20,000,000

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Jul. 21, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class of Stock [Line Items]
Stock repurchased (in shares)				6.2
Common stock issued under stock compensation plan (in shares)				1.4
Net decrease in period (in shares)				4.7
Dividends declared (in dollars per share)		$ 0.12	$ 0.120	$ 0.240	$ 0.24
Subsequent Event
Class of Stock [Line Items]
Dividends declared	$ 28.7

Segment Reporting (Schedule of

Segment Reporting (Schedule of Automotive and Other Segment Reporting) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 428,005,026	$ 229,925,556	$ 911,729,865	$ 683,687,281
Income (loss) from operations	99,924,621	(6,738,256)	233,658,322	98,288,910
Automotive Products
Segment Reporting Information [Line Items]
Revenue	420,622,653	222,067,846	896,240,089	661,923,434
Income (loss) from operations	101,790,310	(6,054,235)	236,458,363	94,721,308
Other
Segment Reporting Information [Line Items]
Revenue	7,382,373	7,857,710	15,489,776	21,763,847
Income (loss) from operations	$ (1,865,689)	$ (684,021)	$ (2,800,041)	$ 3,567,602

Income Taxes (Details)

Income Taxes (Details)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate	15.70%	15.70%

Revenue (Details)

Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 428,005,026	$ 229,925,556	$ 911,729,865	$ 683,687,281
Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	420,622,653	222,067,846	896,240,089	661,923,434
Other Segment
Disaggregation of Revenue [Line Items]
Revenue	7,382,373	7,857,710	15,489,776	21,763,848
Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	420,622,653	222,067,846	896,240,089	661,923,434
Automotive Mirrors & Electronics | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	390,074,655	210,600,540	825,581,585	611,685,854
HomeLink Modules | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	30,547,998	11,467,306	70,658,504	50,237,580
Fire Protection Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	6,319,662	4,837,540	12,123,820	11,006,291
Windows Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	1,062,711	3,020,170	3,365,956	10,757,557
U.S. | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	135,857,058	55,849,461	282,282,375	191,431,379
U.S. | Other Products
Disaggregation of Revenue [Line Items]
Revenue	7,382,373	7,857,710	15,489,776	21,763,847
Germany | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	58,935,672	23,866,009	128,350,856	96,651,733
Japan | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	54,160,515	37,333,947	108,064,110	88,470,880
Mexico | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	28,589,143	13,589,601	60,335,131	59,540,082
Other | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	$ 143,080,265	$ 91,428,828	$ 317,207,617	$ 225,829,360

Leases (Details)

Leases (Details)	Jun. 30, 2021USD ($)
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	2 years
Weighted average discount rate	1.10%
2021 (excluding the six months ended June 30, 2021)	$ 774,897
2022	1,046,545
2023	430,533
2024	38,075
2025	6,369
Thereafter	127
Total future minimum lease payments	2,296,546
Less imputed interest	(12,135)
Total	2,284,411
Accrued Liabilities	1,384,444
Other Non-Current Liabilities	$ 899,967
Operating lease, liability, current, statement of financial position	Accrued liabilities
Operating lease, liability, noncurrent, statement of financial position	OTHER NON-CURRENT LIABILITIES
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	5 years

Acquisitions (Details)

Acquisitions (Details) - USD ($)	Dec. 14, 2020	Sep. 18, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 03, 2021
Business Acquisition [Line Items]
Revenue			$ 428,005,026	$ 229,925,556	$ 911,729,865	$ 683,687,281
Selling, General and Administrative Expenses
Business Acquisition [Line Items]
Acquisition-related costs			$ 350,000		$ 350,000
Argil, Inc.
Business Acquisition [Line Items]
Initial investment in Argil	$ 4,200,000
Air-CraftGlass
Business Acquisition [Line Items]
Purchase price of acquisition		$ 1,100,000
Ownership percentage of business acquisition			100.00%		100.00%
Revenue					$ 0
Argil, Inc.
Business Acquisition [Line Items]
Purchase price of acquisition	$ 3,700,000
Ownership percentage of business acquisition			100.00%		100.00%
Revenue					$ 0
Guardian Optical Technologies
Business Acquisition [Line Items]
Ownership percentage of business acquisition			100.00%		100.00%
Revenue					$ 0
Business acquisition agreement, value							$ 12,000,000

Acquisitions - Schedule of Asse

Acquisitions - Schedule of Assets Acquired and Liabilities Assumed (Details) - Guardian Optical Technologies	Mar. 03, 2021USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Current Assets	$ 32,000
Personal Property	15,000
Deferred Tax Asset	1,049,073
Total Net Assets Acquired	12,041,440
In-Process R&D
Acquired Finite-Lived Intangible Assets [Line Items]
In-Process R&D	$ 10,945,367