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Acquired Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization of intangible assets |  | $ 563 | $ 442 | $ 427
2020 |  | 859 |  |
2021 |  | 859 |  |
2022 |  | 540 |  |
2023 |  | 540 |  |
2024 |  | 498 |  |
Acquisition cash payment |  | $ 2,833 |  |
Gateway Giving, LLC [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Recorded intangible assets | $ 4,983 |  |  |
Acquisition cash payment | 3,000 |  |  |
Amount of earnout | 4,000 |  |  |
Estimated earnout amount | 1,983 |  |  |
Customer Lists [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Recorded intangible assets | 490 |  |  |
Customer Lists [Member] | Minimum [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 7 years |  |
Customer Lists [Member] | Maximum [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 10 years |  |
Patents [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 18 years |  |
Noncompete Agreements [Member] | Minimum [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 2 years |  |
Noncompete Agreements [Member] | Maximum [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 5 years |  |
Software [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Recorded intangible assets | 2,610 |  |  |
Software [Member] | Minimum [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 3 years |  |
Software [Member] | Maximum [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 7 years |  |
Trade Names [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 20 years |  |
Recorded intangible assets | $ 190 |  |  |
Other Intangible Assets [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period |  | 15 years |  |
Goodwill [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period | 15 years |  |  |
Recorded intangible assets | $ 1,693 |  |  |

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