Series A Redeemable Convertible Preferred Stock (Tables)

6 Months Ended

Jun. 30, 2018

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, 2018 and 2017, were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Beginning Balance	$	445,838	$	355,612	$	445,838	$	336,862
Total loss recognized in earnings	37,033		63,948		37,033		82,698
Ending Balance	$	482,871	$	419,560	$	482,871	$	419,560

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, 2018 and 2017, respectively:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Net loss	$	(1,004,104	)	$	(639,801	)	$	(497,227	)	$	(1,751,998	)
Effects of Series A redeemable convertible preferred stock:
Less: Accrual of Series A redeemable convertible preferred stock dividends	214,963			215,089			458,130			419,664
Less: Deemed dividend on Series A redeemable convertible preferred stock	—			—			2,269,042			—
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	77,645			—			115,750			—
Net loss attributable to common stockholders	$	(1,296,712	)	$	(854,890	)	$	(3,340,149	)	$	(2,171,662	)