Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements Of Cash Flows [Abstract]
Net loss	$ (1,414)	$ (1,119)
Adjustments to reconcile net loss to net cash used for operating activities:
Provision for deferred income taxes	(388)	(95)
Share-based compensation expense	82	116
Depreciation and amortization of property, equipment and leasehold improvements	124	122
Accretion of discount on investments available for sale	(14)	(32)
Changes in operating assets and liabilities:
Real estate	(1,893)	758
Accounts receivable, deposits and other assets	26	(37)
Non-refundable option payments	(350)	1,200
Accounts payable and accrued liabilities	(289)	(1,815)
Liability for environmental remediation	(421)	(341)
Income taxes receivable/payable	(2,524)	(2,851)
Other liabilities	14	4
Net cash used for operating activities	(7,047)	(4,090)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of real estate	(17,345)	(11,000)
Purchases of investments (other than short-term)	(47,478)	(43,276)
Proceeds from maturities of investments-available for sale	53,500	38,300
Net cash used for investing activities	(11,323)	(15,976)
Net decrease in cash and cash equivalents	(18,370)	(20,066)
Cash and cash equivalents, beginning of period	40,820	43,788
Cash and cash equivalents, end of period	22,450	23,722
Supplemental disclosures of cash flow information:
Cash paid for income taxes	$ 2,000	$ 2,200