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Income Taxes (Operating Loss Carryforwards, Narrative) (Details)	Dec. 31, 2015 USD ($)
Charitable, Foreign Tax Credit and AMT Carryforward
Operating Loss Carryforwards [Line Items]
Recognized carryforward tax asset	$ 200,000
Orphan Drug and Research and Development Tax Credit
Operating Loss Carryforwards [Line Items]
Recognized carryforward tax asset	1,100,000
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	44,957,970
Federal | Exercise of NonQualified Stock Options
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	43,000,000
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	51,030,683
Operating loss carryforwards, amount subject to full valuation allowance	3,900,000
State | Exercise of NonQualified Stock Options
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 45,100,000

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Operating loss carryforwards, amount subject to full valuation allowance

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

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

+ References

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

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