Long-Term Obligations and Credit Arrangements, Preferred Stock (Details) (USD $)	3 Months Ended		6 Months Ended								3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended			6 Months Ended		6 Months Ended					6 Months Ended	3 Months Ended				6 Months Ended								6 Months Ended
	Aug. 24, 2012	Aug. 26, 2011	Aug. 24, 2012	Aug. 26, 2011	Feb. 24, 2012	Aug. 24, 2012 Notes Payable to Banks [Member]	Feb. 24, 2012 Notes Payable to Banks [Member]	Aug. 24, 2012 Equipment lease [Member]	Feb. 24, 2012 Equipment lease [Member]	Sep. 30, 2012 Medium-term Notes [Member]	Nov. 23, 2012 Dividend and Interest [Member]	Aug. 24, 2012 Libor [Member]	Aug. 24, 2012 Prime [Member]	Nov. 23, 2012 PNC Credit Facility [Member]	Aug. 24, 2012 PNC Credit Facility [Member]	Feb. 22, 2013 PNC Credit Facility [Member]	Aug. 24, 2012 PNC Credit Facility [Member] Libor [Member]	Aug. 24, 2012 PNC Credit Facility [Member] Prime [Member]	Aug. 24, 2012 Dedicated Line of Credit with PNC Bank [Member]	Aug. 24, 2012 ETC-PZL Line of Credit Agreement [Member]	Aug. 24, 2012 Lenfest [Member]	Aug. 24, 2012 Lenfest [Member] Lenfest Credit Facility [Member]	Aug. 24, 2012 Lenfest [Member] PNC Credit Facility [Member]	Oct. 06, 2010 Lenfest [Member] PNC Credit Facility [Member]	Aug. 24, 2012 PNC Bank [Member] 2007 PNC Credit Facility [Member]	Aug. 24, 2012 PNC Bank [Member] PNC Credit Facility [Member]	Nov. 23, 2012 PNC Bank [Member] Medium-term Notes [Member]	Aug. 24, 2012 Series D Preferred Stock [Member]	Feb. 24, 2012 Series D Preferred Stock [Member]	Oct. 06, 2010 Series D Preferred Stock [Member]	Aug. 24, 2012 Series D Preferred Stock [Member] PNC Credit Facility [Member]	Aug. 24, 2012 Series D Preferred Stock [Member] Lenfest [Member]	Oct. 06, 2010 Series D Preferred Stock [Member] Lenfest [Member]	Apr. 24, 2009 Series D Preferred Stock [Member] Lenfest [Member] Lenfest Credit Facility [Member]	Aug. 24, 2012 Series D Preferred Stock [Member] Lenfest [Member] PNC Credit Facility [Member]	Aug. 24, 2012 Series E Preferred Stock [Member]	Feb. 24, 2012 Series E Preferred Stock [Member]	Jul. 02, 2009 Series E Preferred Stock [Member]	Aug. 24, 2012 Series E Preferred Stock [Member] Lenfest [Member]
Line of Credit Facility [Line Items]
Credit facility																									$ 15,000,000	$ 20,000,000
Marketable securities pledged																										10,000,000
Maturity date														Oct. 31, 2015		Jun. 30, 2013
Annual interest equal to amount of securities pledged, percentage (in hundredths)																																2.00%
Loan origination deferred charge associated with warrants																						487,000
Expected volatility rate (in hundredths)																						91.90%
Risk-free interest rate (in hundredths)																						0.49%
Expected life (in years)																						7 years					5 years
Unamortized balance of the deferred charge	85,000		85,000
Line of credit facility, available capacity															5,005,000
Outstanding letter of credit															952,000
Reference rates												LIBOR	prime
Interest rate on amount borrowed under agreement (in hundredths)																	2.50%	0.50%
Fee paid for unused but available funds (in hundredths)															0.125%
Amount of committed line of credit																			5,422,000	175,000
Certificate of deposit with bank																			5,422,000
Fee obligated to pay by an entity (in hundredths)																			3.00%
Covenant terms																										The PNC Credit Agreement has the following financial covenants: (i) a Consolidated Tangible Net Worth covenant, for which the Company must maintain a minimum Consolidated Tangible Net Worth of at least $10,000 and (ii) an EBITDA covenant for which the Company must maintain a minimum cumulative aggregate Earnings Before Interest, Taxes, Depreciation, and Amortization ("EBITDA") of $4,000 for the fiscal quarter then ending and the three preceding fiscal quarters.
Preferred Stock [Abstract]
Number of classes of Cumulative Convertible Participating Preferred Stock			2
Preferred Stock, shares authorized (in shares)																												11,000	11,000							25,000	25,000
Preferred Stock, par value (in dollars per share)	$ 0.05		$ 0.05		$ 0.05																							$ 0.05	$ 0.05							$ 0.05	$ 0.05
Preferred Stock, stated value (in dollars per share)	$ 1,000		$ 1,000																												$ 1,000		$ 1,000			$ 1,000
Preferred Stock, dividend rate (in hundredths)			10.00%
Origination fee, percentage (in hundredths)																																		1.00%	1.00%
Origination fee, amount																																		55
Origination fee paid (in shares)																																		55	100
Preferred Stock, conversion price (in dollars per share)																							$ 3.02								$ 1.11			$ 0.94				$ 2.00
Shares issued upon conversion of preferred stock (in shares)																												225,091			90,090		76,490	58,511		10,870,391		11,870,391
Preferred Stock, shares issued (in shares)																								231							100							23,741
Origination fee expressed as market value of marketable securities pledged, percentage (in hundredths)																															1.00%
Preferred Stock, totaled	22,127,000		22,127,000		22,127,000																							386,000	386,000		100,000					21,741,000	21,741,000
Number of days preceding issuance of shares (in days)																														120D	120D
Interest expense, net	231,000	207,000	445,000	357,000																			231,000
Interest payable accrued																							400
Number of separate agreements into which entity entered to repurchase and retire preferred stock			3
Number of shares repurchased and retired (in shares)																																							2,000
Amount of shares repurchased and retired																																							2,000,000
Dividends accrued	552,000	552,000	1,104,000	1,104,000
Common Stock Warrants [Abstract]
Issuance date of debt															Jul. 02, 2009						Feb. 28, 2009
Amount paid to purchase warrants																					2,000,000
Warrants to purchase common stock (in shares)															450,450						143,885
Amount of guaranteed line of credit																							5,000,000
Value of common stock as percentage of note issued (in hundredths)															10.00%						10.00%
Exercise price of warrants (in dollars per share)															$ 1.11						$ 1.39
Warrants exercisable period (in years)															7Y						7Y
Number of days preceding issuance of warrants (in days)															120D						120D
Restructuring Cost and Reserve [Line Items]
Planned reduction in cash payments											1,000,000
Planned reduction in number of shares of outstanding common stock and common stock equivalents (in shares)											5,000,000
Debt Instrument [Line Items]
Total long-term debt obligations	14,043,000		14,043,000		16,724,000	14,043,000	16,716,000	0	8,000	15,000,000
Less: Current portion of long-term debt obligations	0		0		(8,000)
Total long-term debt obligations, less current portion	$ 14,043,000		$ 14,043,000		$ 16,716,000