Income Taxes (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013
Net operating loss and tax credit carryforwards
Tax credit carryforwards	$ 1,600,000
MBT net operating loss has been derecognized as a result of repeal	65,520,000
Federal
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	202,105,000
State
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	$ 50,133,000