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INVESTMENTS (Details) (USD $)
 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Summary of investments    
Total investments $ 2,381,000 $ 4,623,000
Reduction of carrying value of assets 6,647,000 1,228,000
Revenues from sale of development rights, net   2,497,000
Revenues sale of interest in leasehold land, net 482,000 1,245,000
Investment in two residential parcels
    
Summary of investments    
Total investments 2,331,000 2,331,000
Number of residential parcels held for investment 2  
Reduction of carrying value of assets   689,000
Investment in joint ventures
    
Summary of investments    
Total investments   1,754,000
Reduction of carrying value of assets 1,754,000  
Investment in Kona Village Investors, LLC
    
Summary of investments    
Total investments 0  
Reduction of carrying value of assets   121,000
Investment in leasehold land zoned conservation - Lot 4C
    
Summary of investments    
Total investments 50,000 50,000
Area of land (in acres) 1,000  
Investment in lot acquisition rights - Mauka Lands
    
Summary of investments    
Total investments   488,000
Reduction of carrying value of assets 488,000  
Number of lot acquisition rights owned 14  
Investment in lot acquisition rights - Mauka Lands | Minimum
    
Summary of investments    
Area of land (in acres) 2  
Investment in lot acquisition rights - Mauka Lands | Maximum
    
Summary of investments    
Area of land (in acres) 5  
Kaupulehu Developments
    
Summary of investments    
Sale of development rights under option: Proceeds   2,656,000
Sale of development rights under option: Fees   (159,000)
Revenues from sale of development rights, net   2,497,000
Area of land (in acres) 870  
Number of development increments 2  
Number of single-family lots planned in Increment I 80  
Sale of interest in leasehold land: Proceeds 512,000 1,325,000
Sale of interest in leasehold land: Fees (30,000) (80,000)
Revenues sale of interest in leasehold land, net 482,000 1,245,000
Number of single-family lots sold in Increment I 31  
Kaupulehu Developments | Aggregate gross proceeds up to $100,000,000
    
Summary of investments    
Payments entitled to be received from WB as percentage of gross receipts from WB's sales of single-family residential lots in Increment I 9.00%  
Kaupulehu Developments | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000
    
Summary of investments    
Payments entitled to be received from WB as percentage of gross receipts from WB's sales of single-family residential lots in Increment I 10.00%  
Kaupulehu Developments | Aggregate gross proceeds in excess of $300,000,000
    
Summary of investments    
Payments entitled to be received from WB as percentage of gross receipts from WB's sales of single-family residential lots in Increment I 14.00%  
Kaupulehu Developments | Minimum | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000
    
Summary of investments    
Gross proceeds from sale of Increment I single-family lots on which payments to be received from WB is based 100,000,000  
Kaupulehu Developments | Minimum | Aggregate gross proceeds in excess of $300,000,000
    
Summary of investments    
Gross proceeds from sale of Increment I single-family lots on which payments to be received from WB is based 300,000,000  
Kaupulehu Developments | Maximum | Aggregate gross proceeds up to $100,000,000
    
Summary of investments    
Gross proceeds from sale of Increment I single-family lots on which payments to be received from WB is based 100,000,000  
Kaupulehu Developments | Maximum | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000
    
Summary of investments    
Gross proceeds from sale of Increment I single-family lots on which payments to be received from WB is based $ 300,000,000