Series A Redeemable Convertible Preferred Stock (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2018 and 2017, were as follows:

	Three Months Ended March 31,
	2018		2017
Beginning Balance	$	445,838	$	336,862
Total loss recognized in earnings	—		18,750
Ending Balance	$	445,838	$	355,612

Reconciliation of net (loss) income attributable to common stockholders

The following represents a reconciliation of net loss attributable to common stockholders for the three months ended March 31, 2018 and 2017, respectively:

	Three Months Ended March 31,
	2018			2017
Net income (loss)	$	506,877		$	(1,112,197	)
Effects of Series A redeemable convertible preferred stock:
Less: Accrual of Series A redeemable convertible preferred stock dividends	243,167			204,575
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	38,105			—
Net loss attributable to common stockholders	$	(2,043,437	)	$	(1,316,772	)