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