Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Amortization (Details)

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Goodwill and Intangible Assets - Amortization (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 909 $ 1,057 $ 1,451
Customer contracts      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 90 30 31
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 806 973 1,244
Non-compete agreements      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 1 3 42
Technology      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 12 47 128
Trade names      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 0 $ 4 $ 6