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Note 6 - Note Receivable (Detail) (USD $)
1 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Nov. 30, 2010
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
Building [Member]
Sep. 30, 2011
Building [Member]
Sep. 30, 2012
Building [Member]
Sep. 30, 2011
Building [Member]
Proceeds from Sale of Real Estate $ 200,000              
Notes, Loans and Financing Receivable, Gross, Noncurrent 2,100,000              
Note Receivable Interest Rate 7.00%              
Maturities of Note Receivable 1,900,000              
Deferred Gain, Sale Of Property     700,000          
Gain (Loss) on Sale of Property Plant Equipment   6,000 5,000   1,700 1,600 5,000 4,300
Notes, Loans and Financing Receivable, Net, Noncurrent   $ 1,985,000   $ 2,003,000