Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Change in valuation allowance on loss carry forwards	$ 34,000	$ 15,000	$ 162,000
Deferred tax asset relating to stock-based compensation expense	1,199,000	1,236,000
Tax expense, employee stock transactions	25,000	0	0
Tax accrual, uncertain tax positions	16,000	56,000
Tax-related interest or penalties accrued	0	13,000
Chief Executive Officer [Member]
Income Taxes [Line Items]
Discretionary bonus		350,000
Nondeductible		177,000
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
State and local tax loss carry forwards	1,334,000
State and local tax loss carry forwards expiration date	2013 to 2023
State and local tax loss carry forwards, utilized	708,000
Operating loss carry forwards expired	$ 67,000