Business Combination - Additional Information (Detail) (Bluekite Ltd [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	Jan. 10, 2014
Business Acquisition [Line Items]
Purchase price	$ 14.9
Cash payment	8.9
Common stock equity consideration	2.2
Contingent Equity Consideration [Member]
Business Acquisition [Line Items]
Common stock equity consideration	2.3
Compensation expense	0.2
Cash Holdback [Member]
Business Acquisition [Line Items]
Holdback amount for future unresolved claims	$ 1.5
Cash holdback period on acquisition	18 months