Shareholders' Equity Total compensation cost related to nonvested awards (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
weighted average estimated fair value of restricted stock	$ 5.77	$ 6.53
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation cost		$ 335,600
Excepted weighted-average period in years of compensation cost to be recognized		4 months 17 days
Warrant [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation cost		55,600
Excepted weighted-average period in years of compensation cost to be recognized		1 year 6 months 15 days
Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation cost		$ 2,422,200
Excepted weighted-average period in years of compensation cost to be recognized		3 years 6 months 4 days