Income Tax Expense (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
U.S. Federal statutory rate to net income (loss) before taxes	34.00%
Deferred tax assets, valuation allowance	$ 49,793,000	$ 50,866,000
Change in valuation allowance	(1,100,000)
Net change in valuation allowance, recorded as tax expense	2,417,000	2,244,000	4,097,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	142,000,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	109,000,000
Deferred tax asset related to compensation benefits as well as Federal and State net operating loss carryforwards	7,300,000
Unrecognized tax benefits	30,000	152,000
Undistributed Earnings of Foreign Subsidiaries	0
Research Tax Credit Carryforward | Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Tax credit carryforward amount	4,300,000
Research Tax Credit Carryforward | State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Tax credit carryforward amount	$ 4,100,000