Equity Incentive Plans - Additional Information (Detail) - shares	1 Months Ended	12 Months Ended
	Feb. 28, 2011	Dec. 31, 2015
Omnibus Securities and Incentive Plan 2006
Equity Incentive Plan [Line Items]
Common stock reserved for issuance		102,987
Stock Incentive Plan 2010
Equity Incentive Plan [Line Items]
Common stock reserved for issuance		685,271
Stock option grant, expiry period from grant date	10 years
Common stock, available for grant		59,316
Employee Stock Purchase Plan
Equity Incentive Plan [Line Items]
Common stock reserved for issuance		85,709
Common stock, available for grant		76,629
Share price as percentage of fair market value		85.00%