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Note 6 - Note Receivable (Detail) (USD $)
1 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Nov. 30, 2010
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2012
Building [Member]
Jun. 30, 2011
Building [Member]
Jun. 30, 2012
Building [Member]
Jun. 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   (4,000) (3,000)     3,330 1,900 1,700 2,700
Notes, Loans and Financing Receivable, Net, Noncurrent   $ 1,991,000   $ 2,003,000