Schedule II - Valuation And Qualifying Accounts (Details) (Allowance for doubtful accounts and other sales allowances, USD $)	12 Months Ended
Jan. 25, 2015	Jan. 26, 2014	Jan. 27, 2013
Allowance for doubtful accounts and other sales allowances
Change in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 3,824,676	$ 4,917,070	$ 3,593,579
Charged (Reversal) to Costs and Expenses	396,151	(567,394)	1,323,491
Deductions	(697,679)	(525,000)	0
Balance at End of Year	$ 3,523,148	$ 3,824,676	$ 4,917,070

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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- Definition

+ References

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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