Stockholders' Equity (Schedule of Stock-based Compensation Expense Allocation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 671	$ 261	$ 553
Income tax benefits related to stock-based compensation (before consideration of valuation allowance)	(244)	(92)	(196)
Stock-based compensation, net of taxes	427	169	357
Cost of revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	313	190	291
Research and development, net [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	334	120	126
Selling, general and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 24	$ (49)	$ 136