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Note 6 - Note Receivable (Detail) (USD $)
1 Months Ended 3 Months Ended
Nov. 30, 2010
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
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   (25,000) 2,000  
Notes, Loans and Financing Receivable, Net, Noncurrent   1,997,000   1,979,000
Building [Member]
       
Gain (Loss) on Sale of Property Plant Equipment   $ 1,770 $ 1,650