Stockholders Deficit (Tables)

9 Months Ended

Sep. 30, 2018

A summary of the Company’s stock option activity for the nine months ended September 30, 2018 is as follows:

	Number of Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Balance at December 31, 2017		1,517,771		$	2.97		7.5	$	67,242
Granted		802,500			3.39
Exercised		(96,164	)		2.12			$	182,678
Forfeited		(35,679	)		3.42
Expired/Cancelled		(40,105	)		6.81
Balance at September 30, 2018		2,148,323		$	3.08		7.8	$	4,624,110
Exercisable at September 30, 2018		1,258,202		$	2.93		6.5	$	3,065,442

Summary of Restricted Stock Unit (“RSU”) Plans Activity

A summary of restricted stock unit (“RSU”) activity for the nine months ended September 30, 2018 is as follows:

	Number of Shares			Weighted- Average Grant Date Fair Value Per Share
Balance at December 31, 2017		26,666		$	2.78
Granted		492,051			3.63
Released		(269,551	)		3.76
Balance at September 30, 2018		249,166		$	3.39
Vested and unissued at September 30, 2018		13,126		$	3.40

Summary of Stock-Based Compensation

Stock-based compensation expense recorded in the accompanying interim unaudited condensed statements of operations for the three and nine months ended September 30, 2018 and 2017 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Selling, general and administrative	$	200,317	$	251,924	$	1,475,975	$	826,098
Research and development		41,553		79,619		121,651		261,083
Cost of revenue		16,105		25,862		45,727		84,807
	$	257,975	$	357,405	$	1,643,353	$	1,171,988