Stock Award Plans and Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

There were no stock options granted during the three and nine months ended September 30, 2020. The assumptions underlying the calculation of grant date fair value per share for the three and nine months ended September 30, 2019 are as follows:

	For the Three Months Ended September 30,			For the Nine Months Ended September 30,
	2019			2019
Number of options granted		150			6,033
Weighted-average expected volatility		63.45	%		62.56	%
Weighted-average risk-free interest rate		1.90	%		2.16	%
Weighted-average expected option term (in years)		6.25		6.46
Weighted-average dividend yield		—	%		—	%
Weighted-average fair value per share of grants	$	13.80		$	19.20

Schedule of Stock-based Compensation Expense

The Company recognized stock-based compensation expense related to the issuance of stock option awards, restricted stock awards and restricted stock units to employees, non-employees and directors in the statements of operations as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Cost of goods sold	$	10,994	$	4,449	$	21,246	$	13,058
Research and development		26,749		24,651		52,424		81,492
Selling, general and administrative		143,959		117,851		337,522		645,754
Total	$	181,702	$	146,951	$	411,192	$	740,304