Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020		Jun. 30, 2020	Mar. 31, 2020	Mar. 03, 2021	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 314,681,508	$ 311,922,787	[1]		$ 314,681,508
Acquisitions					2,758,721
Amortization of intangible assets	5,600,000				$ 5,600,000
Amortization expense, remainder of fiscal year	22,000,000
Amortization expense, year one	22,000,000
Amortization expense, year two	19,000,000
Amortization expense, year three	16,000,000
Amortization expense, year four	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
Guardian Optical Technologies
Finite-Lived Intangible Assets [Line Items]
Goodwill						$ 2,758,721
Acquisitions	$ 2,800,000

[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.