10. Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Deferred tax asset:
Net operating loss carryforward	$ 18,658	$ 18,029
Adjustments to reduce land to net realizable value	12	12
Expenses capitalized under IRC 263(a)	56	56
Environmental liability	27	27
Valuation allowance	(18,581)	(17,952)
Total tax asset	172	172
Deferred tax liability:
Basis difference of land and improvement inventories	172	172
Net deferred tax asset