Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 35,935	$ 35,513
Accumulated amortization	(10,693)	(12,316)
Net carrying amount	25,242	23,197
Developed Technology
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	4,303	5,090
Accumulated amortization	(2,815)	(3,225)
Net carrying amount	$ 1,488	$ 1,865
Developed Technology | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	3 years	3 years 14 days
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,768	$ 3,193
Accumulated amortization	(1,290)	(1,526)
Net carrying amount	$ 1,478	$ 1,667
Tradenames | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	5 years	4 years 6 months 3 days
Non-compete
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 240	$ 240
Accumulated amortization	$ (240)	(230)
Net carrying amount		$ 10
Non-compete | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	2 years	2 years
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 28,624	$ 26,990
Accumulated amortization	(6,348)	(7,335)
Net carrying amount	$ 22,276	$ 19,655
Customer Relationships | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	6 years 7 months 20 days	6 years 4 months 20 days