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Investments: (Details 2) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Jun. 30, 2012
Tomsten
Jun. 29, 2013
Tomsten
Dec. 29, 2012
Tomsten
Jun. 29, 2013
Investment in senior subordinated promissory notes in BridgeFunds
Dec. 29, 2012
Investment in senior subordinated promissory notes in BridgeFunds
Investments              
Investment at cost       $ 8,500,000   $ 2,000,000  
Investment owned as a percentage of outstanding common stock       22.00%      
Losses from equity investments 240,700 278,100 278,100        
Carrying amount of investment       $ 0 $ 0 $ 0 $ 0