Stockholders' Equity (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Stock-based compensation expense
Total stock-based compensation expense - continuing operations	$ 689	$ 388	$ 478
Total stock-based compensation expense – discontinued operations		8	66
Total stock-based compensation expense	689	396	544
Cost of revenues
Stock-based compensation expense
Total stock-based compensation expense - continuing operations	108	63	60
Research and development
Stock-based compensation expense
Total stock-based compensation expense - continuing operations	71	77	76
Sales and marketing
Stock-based compensation expense
Total stock-based compensation expense - continuing operations	113	105	112
General and administrative
Stock-based compensation expense
Total stock-based compensation expense - continuing operations	$ 397	$ 143	$ 230