Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
AMT credit carryforwards	$ 500,000
Income Tax (Textual) [Abstract]
Excess tax benefits from Employee Restricted Stock included in Net operating loss carryforwards	500,000
Tax credit carryforwards, Expire year	2027
Unrecognized tax benefits	592,000	324,000
Valuation allowance		53,200,000
Tax credits	600,000	300,000
Valuation allowance recognized	3,000,000
Interest and penalties	38,000
Tax year under income tax examination	2008
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss, carryforward	55,000,000
Net operating loss carryforward, expiry terms, Federal taxes	federal net operating loss carryforwards will expire from 2024 through 2031
Tax credit carryforwards	3,400,000
Federal income tax returns subject to examination description	Federal income tax returns of the Company are subject to IRS examination for the 2008 through 2010 tax years.
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss, carryforward	83,400,000
Net operating loss carryforward, expiry terms, Federal taxes	state net operating loss carryforwards will expire 2015 through 2031
Tax credit carryforwards	$ 700,000
Federal income tax returns subject to examination description	State income tax returns are subject to examination for a period of three to four years after filing.