Net Loss Per Common Share

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Net Loss Per Common Share

Net Loss Per Common Share

Basic and dilutive net loss per common share were as follows:

	Quarters Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Net loss applicable to common stockholders	$	(531,584)	$	(851,944)	$	(591,367)	$	(1,509,315)
Weighted average number of common shares outstanding, basic and dilutive	4,155,948		3,014,523		3,977,028		2,235,874
Net loss per common share applicable to common stockholders, basic and diluted	$	(0.13)	$	(0.28)	$	(0.15)	$	(0.68)

Shares underlying the following potentially dilutive weighted average number of common stock equivalents were excluded from the calculation of diluted net loss per common share because their effect was anti-dilutive for each of the periods presented: 

	Quarters Ended June 30,		Six Months Ended June 30,
	2021	2020	2021	2020
Options	439,410	163,481	404,156	163,774
Warrants	—	27,287	—	34,686
Convertible preferred stock	62	62	62	62
Total	439,472	190,830	404,218	198,522

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Quarters Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Net loss applicable to common stockholders	$	(531,584)	$	(851,944)	$	(591,367)	$	(1,509,315)
Weighted average number of common shares outstanding, basic and dilutive	4,155,948		3,014,523		3,977,028		2,235,874
Net loss per common share applicable to common stockholders, basic and diluted	$	(0.13)	$	(0.28)	$	(0.15)	$	(0.68)