Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 15,618	$ 15,356
Accumulated amortization	(7,666)	(6,722)
Net carrying amount	7,952	8,634
Developed Technology
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	4,075	4,065
Accumulated amortization	(2,282)	(2,017)
Net carrying amount	$ 1,793	$ 2,048
Developed Technology | Weighted Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	3 years 15 days	3 years 15 days
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,634	$ 2,495
Accumulated amortization	(822)	(701)
Net carrying amount	$ 1,812	$ 1,794
Trade Names | Weighted Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	5 years 2 months 5 days	5 years 2 months 5 days
Noncompete Agreements
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 240	$ 240
Accumulated amortization	(140)	(110)
Net carrying amount	$ 100	$ 130
Noncompete Agreements | 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	$ 8,669	$ 8,556
Accumulated amortization	(4,422)	(3,894)
Net carrying amount	$ 4,247	$ 4,662
Customer Relationships | Weighted Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	5 years	5 years