Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases
Current portion of deferred rent	$ 406,000
Long-term portion of deferred rent	2,201,000	$ 2,562,000
Total deferred rent	2,607,000	2,562,000
Rent expense under operating leases	5,700,000	$ 4,200,000	$ 2,700,000
Capital leases	0
Future minimum operating lease payments
2016	6,816,000
2017	7,175,000
2018	5,103,000
2019	704,000
Total	19,798,000
Future payments for non-cancellable contractual agreements
2016	4,400,000
2017	3,100,000
2018	$ 200,000