Equity - Stock-Based Compensation Expense Reflected Within Consolidated Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Components of Stock-based compensation expense
Stock-based compensation expense	$ 64	$ 301
Cost of services
Components of Stock-based compensation expense
Stock-based compensation expense	14	74
Research and development
Components of Stock-based compensation expense
Stock-based compensation expense	23	75
Selling, general and administrative
Components of Stock-based compensation expense
Stock-based compensation expense	$ 27	$ 152