Series A Redeemable Convertible Preferred Stock (Tables)

6 Months Ended

Jun. 30, 2017

Equity [Abstract]

Embedded Derivative Instruments Rollforward

The fair value of these derivative instruments and the loss recorded on the change in the fair value of these derivative instruments, which was included in “Interest and other income, net” within the condensed consolidated statement of operations, for the three and six months ended June 30, 2017 and 2016, were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Beginning Balance	$	355,612	$	133,229	$	336,862	$	82,024
Total loss recognized in earnings	63,948		31,441		82,698		82,646
Ending Balance	$	419,560	$	164,670	$	419,560	$	164,670

Reconciliation of net (loss) income attributable to common stockholders

The following represents a reconciliation of net loss attributable to common stockholders for the three and six months ended June 30, 2017 and 2016:

	Three Months Ended June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Net loss	$	(639,801	)	$	(3,534,882	)	$	(1,751,998	)	$	(7,831,494	)
Effects of Series A redeemable convertible preferred stock:
Less: Series A redeemable convertible preferred stock dividends	215,089			195,366			419,664			387,974
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	—			170,981			—			334,650
Net loss attributable to common stockholders	$	(854,890	)	$	(3,901,229	)	$	(2,171,662	)	$	(8,554,118	)