Accrued Liabilities (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accrued Liabilities
Payroll and related items	$ 426,000	$ 328,000
Real estate taxes	997,000	955,000
Pension	707,000	662,000
Other	773,000	639,000
Total	$ 2,903,000	$ 2,584,000