Income Taxes (Operating Loss Carryforwards, Narrative) (Details) (USD $)	Dec. 31, 2013
Charitable, Foreign Tax Credit and AMT Carryforward
Operating Loss Carryforwards [Line Items]
Recognized carryforward tax asset	$ 300,000
Orphan Drug and Research and Development Tax Credit
Operating Loss Carryforwards [Line Items]
Recognized carryforward tax asset	1,000,000
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	45,374,295
Federal \| Exercise of NonQualified Stock Options
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	43,398,774
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	56,416,271
Operating loss carryforwards, amount subject to full valuation allowance	2,800,000
State \| Exercise of NonQualified Stock Options
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 51,800,000

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Carryforwards

-URI http://asc.fasb.org/extlink&oid=6506874

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 48

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 17

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_TaxCreditCarryforwardAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant