Summary of Business and Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2013

Accounting Policies [Abstract]

Depreciation and amortization computed on the straight-line method for financial reporting purposes based upon estimated useful lives

Depreciation and amortization are computed on the straight-line method for financial reporting purposes based upon the following estimated useful lives:

Land improvements	5 to 25 years
Buildings and building improvements	5 to 40 years
Machinery and equipment	3 to 10 years
Leasehold improvements	shorter of lease or useful life

Asset retirement obligations related to leased manufacturing facilities

	January 31,
	2013		2012
Balance at beginning of period	$	545,000	$	636,000
Decrease in obligation	—		(100,000		)
Accretion expense	9,000		9,000
Balance at end of period	$	554,000	$	545,000

Computation of basic and diluted loss per share

The following table sets forth the computation of basic and diluted loss per share:

In thousands, except per share data	2012			2011			As Adjusted 2010
Numerator
Net loss	$	(3,830	)	$	(13,803	)	$	(17,594	)
Denominator
Weighted-average shares — basic	14,387			14,235			14,130
Common equivalent shares from common stock options and warrants	—			—			—
Weighted-average shares — diluted (1)	14,387			14,235			14,130
Net loss per common share
Basic	$	(0.27	)	$	(0.97	)	$	(1.25	)
Diluted	(0.27		)	(0.97		)	(1.25		)

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(1) For the years ended January 31, 2013, 2012 and 2011, approximately 119,000 , 56,000 and 59,000, respectively, shares of common stock equivalents were excluded in the computation of diluted net income per share, as the effect would be anti-dilutive.