Balance Sheet Components, Other Current Liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Balance Sheet Components [Abstract]
Accrued variable compensation		$ 6,091	$ 10,979
Deferred revenues		3,179	3,138
Payroll related costs		2,665	2,607
Accrued subcontractor fees		505	1,049
Accrued medical claims expense		1,880	1,859
Professional Fees		424	420
Estimated fair value of contingent consideration liability	[1]	4,087	3,384
Net working capital settlements		130	62
Other current liabilities		3,995	4,139
Total		$ 22,956	$ 27,637

[1] As of March 31, 2017, represents the fair value estimate of additional earnings-based contingent consideration that may be realized by Enlighten, Bluetube, LLC ("Bluetube") and RAS twelve months after the applicable acquisition. As of December 31, 2016, represents the fair value estimate of additional earnings-based contingent consideration that may be realized by the Market Street selling shareholders, Enlighten and Bluetube twelve months after the applicable acquisition.