Stockholders Equity (Deficit) (Tables)

12 Months Ended

Dec. 31, 2016

The Company incurs stock-based compensation expense relating to the grants of RSUs and stock options to employees and non-employee directors and through its employee stock purchase plan. Amounts recognized in the statements of operations with respect to the Company’s stock-based compensation were as follows:

	Year Ended December 31,
	2016		2015
Selling, general and administrative	$	651,034	$	367,000
Research and development		195,685		38,426
Cost of revenue		56,865		—
	$	903,584	$	405,426

Summary of Stock Option Plans Activity

The following table summarizes stock option activity during the two-year period ended December 31, 2016:

	Number of Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Balance at January 1, 2015		595,577		$	3.71	7.8		$	-
Granted		171,408		6.11
Exercised		(13,960	)	2.5				$	86,070
Forfeited		(16,380	)		8.57
Balance at December 31, 2015		736,645		$	4.18		7.5	$	947,794
Granted		563,400		2.46
Exercised		(11,093	)	2.15				$	2,126
Forfeited		(70,754	)		4.60
Expired/Cancelled		(56,493	)		3.97
Balance at December 31, 2016		1,161,705		$	3.35		7.7	$	36,887
Vested and expected to vest at December 31, 2016		1,087,266		$	3.36	7.6		$	36,465
Exercisable at December 31, 2015		410,649		$	3.55	6.3		$	641,115
Exercisable at December 31, 2016		593,670		$	3.46	6.4		$	28,822

Summary of Material Factors Incorporated in Black-Scholes Model In Estimating Fair Value of Options Granted

The material factors incorporated in the Black-Scholes model in estimating the fair value of the options granted for the periods presented were as follows:

	2016	2015
Fair value of common stock	$ 1.98 - 2.88	$ 4.88 - 14.64
Risk-free interest rate	1.13% - 2.08%	1.36% - 2.22%
Expected volatility	59.9% - 93.7%	60.5% - 75.0%
Expected term	4.8 to 6.2 years	5.0 to 10 years
Expected dividend yield	—%	—%

Summary of RSU Award Activity

The following table summarizes RSU award activity during the two-year period ended December 31, 2016:

	Restricted Stock Units (RSU)			Weighted- Average Grant Date Fair Value Per Share
Balance at January 1, 2015	$	—		$	—
Granted		27,500		5.45
Vested		—			—
Forfeited		—			—
Balance at December 31, 2015		27,500		$	5.45
Granted		389,761		2.43
Vested		(36,762	)		2.90
Forfeited		(25,000	)		2.46
Balance at December 31, 2016		355,499		$	2.41
Vested and expected to vest at December 31, 2016		342,879		$	2.42

Employee Stock Purchase Plan

Summary of Material Factors Incorporated in Black-Scholes Model In Estimating Fair Value of Options Granted

The material factors incorporated in the Black-Scholes model in estimating the fair value of the ESPP awards for the periods presented were as follows:

	2016
Fair value of common stock	$ 3.03 - 4.09
Risk-free interest rate	0.41% - 0.48%
Expected volatility		70.0%
Expected term	0.5 years
Expected dividend yield	—%