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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Apr. 03, 2020 | Dec. 31, 2019 | [1] | Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill | $ 309,033,022 |  | $ 309,033,022 |  |  | $ 307,365,845 |
Acquisitions |  |  | 1,667,177 |  |  |  |
Amortization expense | 5,600,000 | $ 11,200,000 | 5,600,000 | $ 11,200,000 |  |  |
Amortization expense, 2020 | 22,000,000 |  | 22,000,000 |  |  |  |
Amortization expense, 2021 | 22,000,000 |  | 22,000,000 |  |  |  |
Amortization expense, 2022 | 21,000,000 |  | 21,000,000 |  |  |  |
Amortization expense, 2023 | 19,000,000 |  | 19,000,000 |  |  |  |
Amortization expense, 2024 | 16,000,000 |  | $ 16,000,000 |  |  |  |
HomeLink® |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 307,400,000
Vaporsens Inc |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 1,667,177 |  |
Acquisitions | $ 1,700,000 |  |  |  |  |  |
[1] | The condensed consolidated balance sheet at December 31, 2019 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.

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