Stockholders' Equity (Details) (USD $)	1 Months Ended		12 Months Ended
	Nov. 30, 2013	Jun. 30, 2012	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012	Jul. 31, 2013	Jun. 02, 2012	May 31, 2012
Class of Warrant or Right [Line Items]
Common stock, shares authorized			100,000,000	100,000,000
Preferred stock, shares authorized			10,000,000	10,000,000
Shelf registration maximum offering						$ 40,000,000
Shares issued in aggregate	8,740,000	5,122,000
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001	$ 0.001
Share Price (in dollars per share)	$ 2.90		$ 3.86
Proceeds from offering	23,100,000	11,900,000
Stock issuance cost	2,200,000	929,000	2,219,000	0	0
Common stock and warrant		2,304,900
Increase in maximum amount of securities able to be sold under shelf registration statement							$ 3,400,000	$ 3,400,000
Warrant [Member]
Class of Warrant or Right [Line Items]
Class of warrant or right number of securities called by warrants or rights per unit		0.45
Price (in dollars per unit)		2.50
Exercise period of warrants			60 months
Fair value grant date (in dollars per unit)			0.97
Exercise price of warrants (in dollars per unit)			2.98
Expected term			5 years
Risk free interest rate			0.89%
Expected volatility rate			62.18%
Expected dividend rate (in dollars per share)			$ 0