Consolidated Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Temporary timing differences:
Stock compensation	$ 1,722	$ 1,079
Contingent consideration	3,333	2,126
Other	1,895	1,150
Total temporary timing differences	6,950	4,355
Net operating loss carryforwards	12,284	12,389
Tax business credits carryforwards	2,036	1,820
Total deferred tax assets	21,270	18,564
Valuation allowance	(9,979)	(18,514)
Net deferred tax assets	11,291	50
Deferred tax liabilities:
Goodwill and intangible assets	(7,346)	(501)
Conversion option on convertible notes	(6,048)
Total deferred tax liabilities	(13,394)	(501)
Net deferred tax liabilities	$ (2,103)	$ (451)