Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Net deferred tax assets	$ 44,000,000	$ 42,100,000
Income tax expense		8,884,000
Contributed capital adjustment if future tax benefits are subsequently recognized	1,300,000
Federal net operating loss carryforwards	114,100,000
State net operating loss carryforwards	1,200,000
Research and development tax credit carryforwards	$ 2,214,000	$ 1,979,000