Commitments and Contingencies (Additional Information) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 24, 2017 USD ($) operating_leases	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Line of Credit Facility [Line Items]
Purchase obligation		$ 2,471
Increase in obligation of third year if a 10% increase in revenue		250
Rent expense		$ 2,100	$ 2,100	$ 1,900
Capital leases, term of contract (in years)		4 years
Software Development Services [Member] | Investor [Member]
Line of Credit Facility [Line Items]
Purchase obligation		$ 2,500
Maximum optional renewal period of purchase obligation (in years)		5 years
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Operating leases, subleased | operating_leases	2
Sublease income	$ 231