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Investment in Leasing Operations: (Details 4) (Investment in leases, USD $)	9 Months Ended
	Sep. 29, 2012	Sep. 24, 2011
Investment in leases
Activity in the allowance for credit losses for leasing operations
Balance at beginning of period	$ 803,800	$ 907,800
Provisions charged to expense	(69,600)	8,200
Recoveries	195,900	248,500
Deductions for amounts written-off	(128,100)	(288,100)
Balance at end of period	$ 802,000	$ 876,400

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

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-Publisher FASB

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-Topic 310

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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-Publisher FASB

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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- Definition

The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9



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-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 168, 169, 170

-IssueDate 2006-05-01

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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