Goodwill and Intangible Assets - Intangible Assets Relate to Customer Relationships (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Net Carrying Value	$ 169	$ 267
Customer relationships [Member] | TestQuest, Inc and BSQUARE EMEA, Ltd [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,275	1,275
Accumulated Amortization	(1,106)	(1,008)
Net Carrying Value	$ 169	$ 267