Stock-Based Compensation - Additional Information (Details) - Employee Stock Purchase Plan	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2015 USD ($) shares	Jun. 30, 2017 purchase_period	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP offering period		24 months
Number of purchase periods | purchase_period		4
Maximum number of shares available for employee to purchase per offering period | shares	10,000
Term of offering period			Each purchase period begins on the first trading day on or after May 15 and November 15 of each year.
Maximum percentage in payroll deductions to acquire shares of common stock	15.00%
Maximum deductible fair market value of shares available for employee to purchase per calendar year | $	$ 25,000