INVESTMENTS (Details)		12 Months Ended			24 Months Ended
	Nov. 27, 2013 USD ($) partnership	Sep. 30, 2018 USD ($) a lot	Sep. 30, 2017 USD ($) a lot	Sep. 30, 2016 lot	Sep. 30, 2018 USD ($) a lot
Summary of investments
Total investments		$ 1,608,000	$ 2,209,000		$ 1,608,000
Equity in income of affiliates		223,000	2,276,000
Kaupulehu Developments
Summary of investments
Sale of interest in leasehold land		1,645,000	4,503,000
Sale of interest in leasehold land: Fees		(216,000)	(648,000)
Sale of interest in leasehold land, net		$ 1,429,000	$ 3,855,000
KD Kaupulehu LLLP Increment II | Kaupulehu Developments
Summary of investments
Percent of Increment II distributions		50.00%	50.00%
50% of Increment II distributions received		$ 1,000,000	$ 2,500,000		3,500,000
Contingent payments, unrecorded		$ 8,000,000			$ 8,000,000
Number of lots sold | lot			1	1
Number of lots developed | lot			2
KD Kaupulehu LLLP Increment II | Kaupulehu Developments | Minimum
Summary of investments
Payments entitled to be received as percentage of gross proceeds from sale of single family lots		8.00%
Payments entitled to be received as percentage of gross proceeds from sale of units on a lot		2.60%
Increment II Lot size | a			2
KD Kaupulehu LLLP Increment II | Kaupulehu Developments | Maximum
Summary of investments
Payments entitled to be received as percentage of gross proceeds from sale of single family lots		10.00%
Payments entitled to be received as percentage of gross proceeds from sale of units on a lot		3.25%
Increment II Lot size | a			3
KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Summary of investments
Gross proceeds from sale of Increment I single-family lots on which payments to be received from KD I is based		$ 215,000,000
Number of Lots Remaining to be Sold | lot		20			20
Number of lots sold | lot		3			6
Number of lots developed | lot		80
KD Kaupulehu LLLP Increment I | Kaupulehu Developments | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000
Summary of investments
Payments entitled to be received as percentage of gross proceeds from sale of single family lots		10.00%
KD Kaupulehu LLLP Increment I | Kaupulehu Developments | Aggregate gross proceeds in excess of $300,000,000
Summary of investments
Payments entitled to be received as percentage of gross proceeds from sale of single family lots		14.00%
KD Kaupulehu LLLP Increment I | 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 KD I is based		$ 100,000,000
KD Kaupulehu LLLP Increment I | 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 KD I is based		300,000,000
KD Kaupulehu LLLP Increment I | 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 KD I is based		300,000,000
Investment in land development partnerships
Summary of investments
Total investments		1,558,000	$ 2,159,000		$ 1,558,000
Number of limited liability limited partnerships formed | partnership	2
Cash distribution from equity method investment, net		735,000	3,223,000
Minority interests portion of distribution from equity investee		89,000	396,000
Equity in income of affiliates		223,000	2,276,000
Basis difference between the underlying equity in net assets of the investee and the carrying value of the entity's investment		314,000			$ 314,000
Basis difference adjustment		8,000	28,000
Summarized financial information
Revenue		11,362,000	31,578,000
Gross profit		5,757,000	14,584,000
Net earnings		$ 1,815,000	11,107,000
Investment in land development partnerships | KD Kukio Resorts, LLLP, KD Maniniowali, LLLP, and KD Kaupulehu, LLLP
Summary of investments
Ownership interest acquired, aggregate cost	$ 5,140,000
Investment in land development partnerships | KD Kukio Resorts, LLLP
Summary of investments
Ownership interest acquired	19.60%
Investment in land development partnerships | KD Maniniowali, LLLP
Summary of investments
Ownership interest acquired	19.60%
Investment in land development partnerships | KD Kaupulehu, LLLP
Summary of investments
Ownership interest acquired	19.60%
Investment in land development partnerships | KD Kaupulehu LLLP Increment II Phase 2A
Summary of investments
Number of single family lots, rights to | lot		3			3
Investment in leasehold land interest - Lot 4C
Summary of investments
Total investments		$ 50,000	$ 50,000		$ 50,000
Area of land (in acres) | a		1,000			1,000