Shareholders' Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Shareholders' equity (Textual)
Stock awards granted	128,000	121,000
Compensation cost attributable to stock options	$ 0	$ 12,000
Options exercised, shares	145,000
Total cash received by stock option exercised during period	63,250	79,667
Number of shares withhold in connection with net exercise feature of options	14,633	42,838
Common stock, par value	$ 0.01	$ 0.01
Dividends paid to common shareholders	440,016
Dividends declared per common share	$ 0.05
Employees and Consultant [Member]
Shareholders' equity (Textual)
Stock awards granted	128,000	121,000
Compensation cost attributable to stock options	356,000	306,000
Options exercised, shares	145,000	193,400
Total cash received by stock option exercised during period	63,000	80,000
Paid in capital from option exercises	$ 49,600	$ 80,000
Stock issued during period, Shares	130,367	150,562
Number of shares withhold in connection with net exercise feature of options	14,633	42,838