Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Measurements

Schedule of financial instruments measured at fair value by level within fair value hierarchy

	Level 1		Level 2		Level 3
September 30, 2015
Assets:
Cash and cash equivalents	$	39,359,262	$	—	$	—
Total assets at fair value	$	39,359,262	$	—	$	—
Liabilities:
Common stock warrants	$	—	$	—	$	251,247
Total liabilities at fair value	$	—	$	—	$	251,247

	Level 1		Level 2		Level 3
December 31, 2014
Assets:
Cash and cash equivalents	$	40,135,102	$	—	$	—
Total assets at fair value	$	40,135,102	$	—	$	—
Liabilities:
Common stock warrants	—		—		296,048
Total liabilities at fair value	$	—	$	—	$	296,048

Rollforward of fair value of Level 3 warrants

Beginning balance at December 31, 2014	$	296,048
Change in fair value	(44,801		)
Ending balance at September 30, 2015	$	251,247