Subsequent Events (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended		3 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Mar. 12, 2015	Jan. 02, 2015	Nov. 21, 2014
Subsequent Event [Line Items]
At the market preferred stock, shares authorized					9,000,000
Series A Preferred Stock
Subsequent Event [Line Items]
At the market shares sold	4,906,734	899,497
Proceeds from at the market preferred stock	$ 111,148	$ 22,062
Subsequent event \| Series A Preferred Stock
Subsequent Event [Line Items]
At the market shares sold			2,601,898
Proceeds from at the market preferred stock			61,241
Subsequent event \| Securities Service Network, Inc. (SSN), Renaissance Capital Corporation (RCC)
Subsequent Event [Line Items]
Consideration transferred				45,000
Subsequent event \| Securities Service Network, Inc. (SSN), Renaissance Capital Corporation (RCC) \| Promissory Notes \| 0.41% Promissory Notes
Subsequent Event [Line Items]
Notes payable-long term				25,000
Interest rate, stated percentage				0.41%
Subsequent event \| Securities Service Network, Inc. (SSN), Renaissance Capital Corporation (RCC) \| Promissory Notes \| 1.74% Promissory Notes
Subsequent Event [Line Items]
Notes payable-long term				$ 20,000
Term				4 years
Interest rate, stated percentage				1.74%