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Schedule II - Valuation and Qualifying Accounts: (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Cost Basis |  |
Balance at beginning of year | $ 34,915,538 | $ 33,539,000
Additions | 2,229,000 | 1,377,000
Disposals | 0 | 0
Balance at end of year | 36,571,114 | 34,915,538
Accumulated depreciation |  |
Balance at beginning of year | 26,072,000 | 24,486,000
Depreciation | 1,800,000 | 1,586,000
Disposals | 0 | 0
Balance at end of year | $ 27,872,000 | $ 26,072,000

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- Definition The decrease in accumulated depreciation, depletion and amortization (relating to property, plant and equipment) as a result of sales or disposals of property, plant and equipment during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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