Fair Value Measurements (Schedule Of Unrealized Losses From Investments)(Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 0	$ 517,188
Less than 12 months, Unrealized Losses	0	53,352
12 months or greater, Fair Value	14,000	19,210
12 months or greater, Unrealized Losses	4,116	9,629
Total, Fair Value	14,000	536,398
Total, Unrealized Losses	4,116	62,981
Cement Industry [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	0	517,188
Less than 12 months, Unrealized Losses	0	53,352
12 months or greater, Fair Value	14,000	12,900
12 months or greater, Unrealized Losses	4,116	5,216
Total, Fair Value	14,000	530,088
Total, Unrealized Losses	4,116	58,568
Residential Construction Industry [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value		0
Less than 12 months, Unrealized Losses		0
12 months or greater, Fair Value		6,310
12 months or greater, Unrealized Losses		4,413
Total, Fair Value		6,310
Total, Unrealized Losses		$ 4,413