Goodwill and Intangible Assets - Schedule of Acquired Intangible Assets by Major Asset Class (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross	$ 1,353	$ 1,353
Additions	5,229
Accumulated amortization	(1,636)	(704)
Net book value before impairment	4,946	649
Impairment charge	(411)	(411)
Net book value	4,535	238
Purchased Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	265	265
Additions	2,253
Accumulated amortization	(687)	(125)
Net book value before impairment	1,831	140
Net book value	1,831	140
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	999	999
Additions	2,976
Accumulated amortization	(860)	(499)
Net book value before impairment	3,115	500
Impairment charge	(411)	(411)
Net book value	$ 2,704	$ 89
Trademarks/Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	2 years	2 years
Gross	$ 38	$ 38
Accumulated amortization	$ (38)	$ (38)
Non-Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years	3 years
Gross	$ 51	$ 51
Accumulated amortization	$ (51)	(42)
Net book value before impairment		9
Net book value		$ 9
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	2 years
Minimum [Member] | Purchased Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years	4 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years	3 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years
Maximum [Member] | Purchased Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	6 years	6 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years	6 years