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Net Loss Per Common Share (Tables)
9 Months Ended
Sep. 30, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
Quarters Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Net income (loss) applicable to common stockholders
$
(1,404,600
)
 
$
1,086,058

 
$
(2,716,284
)
 
$
2,826,238

 
 
 
 
 
 
 
 
Weighted average number of common shares outstanding, basic
9,781,755

 
7,365,038

 
8,863,159

 
7,016,789

Dilutive convertible preferred stock

 
6,584,674

 

 
6,847,164

Weighted average number of common shares outstanding, dilutive
9,781,755

 
13,949,712

 
8,863,159

 
13,863,953

 
 
 
 
 
 
 
 
Net income (loss) per common share applicable to common stockholders, basic
$
(0.14
)
 
$
0.15

 
$
(0.31
)
 
$
0.40

Net income (loss) per common share applicable to common stockholders, diluted
$
(0.14
)
 
$
0.08

 
$
(0.31
)
 
$
0.20

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
 
Quarters Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Options
404,395

 
474,148

 
458,207

 
426,166

Warrants
442,215

 
459,375

 
453,592

 
459,375

Convertible preferred stock
4,203,936

 

 
5,108,289

 

Total
5,050,546

 
933,523

 
6,020,088

 
885,541