Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 27, 2013	Jan. 22, 2012	Jan. 27, 2013	Jan. 22, 2012
Loss applicable to common shares:
Loss from continuing operations	$ (1,002)	$ (316)	$ (599)	$ (3,905)
Loss from discontinued operations	(1,184)	(866)	(1,579)	(1,057)
Net loss	$ (2,186)	$ (1,182)	$ (2,178)	$ (4,962)
Denominator:
Denominator for basic loss per share - weighted average shares	39,488,480	38,982,281	39,280,965	38,670,827
Denominator for diluted earnings loss per share - adjusted weighted average shares and assumed conversions	39,488,480	38,982,281	39,280,965	38,670,827
Basic loss per share:
Loss from continuing operations (in dollars per share)	$ (0.03)	$ (0.01)	$ (0.02)	$ (0.10)
Loss from discontinued operations (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.04)	$ (0.03)
Net loss (in dollars per share)	$ (0.06)	$ (0.03)	$ (0.06)	$ (0.13)
Diluted loss per share:
Loss from continuing operations (in dollars per share)	$ (0.03)	$ (0.01)	$ (0.02)	$ (0.10)
Loss from discontinued operations (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.04)	$ (0.03)
Net loss (in dollars per share)	$ (0.06)	$ (0.03)	$ (0.06)	$ (0.13)
Anti-dilutive shares excluded from calculation of EPS	1,009,160	1,279,710	1,009,160	1,069,710
Potentially dilutive shares excluded from calculation of EPS	18,041	0	22,206	21,655
Dilutive RSU shares excluded from calculation of EPS	1,714,286		1,714,286