Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Measurements

Schedule of assets and liabilities measured at fair value on recurring basis

Assets and Liabilities	Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of June 30, 2013
Assets:
Cash and cash equivalents	$	92,685,912	$	—	$	—	$	92,685,912
Total assets at fair value	$	92,685,912	$	—	$	—	$	92,685,912
Liabilities:
Put Option	$	—	$	—	$	—	$	—
Total liabilities at fair value	$	—	$	—	$	—	$	—

Assets and Liabilities	Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Balance as of December 31, 2012
Assets:
Cash and cash equivalents	$	2,025,338	$	—	$	—		$	2,025,338
Total assets at fair value	$	2,025,338	$	—	$	—		$	2,025,338
Liabilities:
Put Option	$	—	$	—	$	(30,415	)	$	(30,415	)
Total liabilities at fair value	$	—	$	—	$	(30,415	)	$	(30,415	)

Schedule of quantitative information associated with fair value measurement of the Company's Level 3 inputs

	Fair Value as of December 31, 2012		Valuation Technique	Unobservable Input	Range (Weighted Average)
Put option liability	$	30,415	Probability-adjusted discounted cash flow	Probabilities of success	25% — 45% (35)%
				Periods in which outcomes are expected to be achieved	2013
				Discount rate	12%

Schedule of changes in fair value of the Company's Level 3 put option liability

	Level 3
Balance at December 31, 2012	$	30,415
Fair value adjustment to put option liability included in other income	(30,415		)
Balance as of June 30, 2013	$	—