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Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value

The following table presents our financial assets and liabilities measured at fair value as of December 31, 2014:

		Fair Value Measurement at Reporting Date Using
		Quoted Prices in Active Markets for Identical Assets (Level 1)				Unobservable Inputs (Level 3)				As of December 31, 2014
Financial assets
Cash equivalents:
Money market funds		$	421,418			$	—			$	421,418
U.S. Treasury debt obligations			23,167,257				—				23,167,257
Total financial assets		$	23,588,675			$	—			$	23,588,675
Financial liabilities
Loan payable net of discounts		$	—			$	15,020,417			$	15,020,417
Warrant liabilities			—				1,684,551				1,684,551
Total financial liabilities		$	—			$	16,704,968			$	16,704,968

Roll Forward for Financial Assets and Liabilities Measured at Fair Value Using Significant Other Observable Inputs (Level 2)

The following table presents a roll forward for financial assets and liabilities measured at fair value using significant other observable inputs (Level 2) for 2014.

		Level 2 Beginning Balance 12/31/13 $				Settled $				Level 2 Ending Balance 12/31/14 $
Bond obligation			125,000				(125,000	)			—

Roll Forward for Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3)

The following table presents a roll forward for liabilities measured at fair value using significant unobservable inputs (Level 3) for 2014.

		Warrant Liabilities
Balance at December 31, 2013		$	5,541,809
Less fair value of warrants exercised			(1,434,807	)
Add change in fair value of warrants			(2,422,451	)
Balance at December 31, 2014		$	1,684,551

		Loan Payable
Balance at December 31, 2013		$	12,909,244
Add loan proceeds			5,775,543
Less repayments of principal			(3,857,971	)
Add accretion of discount			193,601
Balance at December 31, 2014		$	15,020,417
Current portion		$	4,686,388
Non-current portion			10,334,029
Balance at December 31, 2014		$	15,020,417

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- Definition

Fair Value Assets Measured On Recurring Basis Directly Or Indirectly Observable Input Reconciliation Table [Text Block]

+ References

No definition available.

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- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258

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