Organization and Description of Business - Revenue Recongition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue Recognition
Revenue recognized when cash is received	$ 9,349	$ 6,587	$ 17,575	$ 11,973
Revenue recognized on accrual basis, percentage	64.00%	55.00%	62.00%	52.00%
Revenue recognized on an accrual basis	$ 5,326	$ 5,321	$ 10,650	$ 11,153
Revenue recognized received in cash, percentage	36.00%	45.00%	38.00%	48.00%
Total	$ 14,675	$ 11,908	$ 28,225	$ 23,126
Revenue, percent	100.00%	100.00%	100.00%	100.00%