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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Option, Activity
The following table summarizes stock option activity for the year-ended December 31, 2019:
 
Options Outstanding
 
Shares
 
Weighted
Average
Exercise Price
Outstanding, December 31, 2018
5,613,057

 
$
0.83

Options granted
1,985,000

 
0.35

Options expired / forfeited
(3,526,724
)
 
0.76

Outstanding, December 31, 2019
4,071,333

 
0.58

Exercisable, December 31, 2019
3,121,333

 
$
0.65
Share-based Payment Arrangement, Option, Exercise Price Range
The following table summarizes additional information on the Company's stock options outstanding at December 31, 2019:
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise
Prices
 
Number Outstanding
 
Weighted- Average Remaining Contractual
Life (Years)
 
Weighted Average Exercise Price
 
Number Exercisable
 
Weighted Average Exercise Price
$0.28 - $1.00
 
3,847,000

 
8.31
 
$
0.57

 
2,897,000

 
$
0.64

$1.56 - $1.80
 
209,133

 
7.38
 
$
1.79

 
209,133

 
$
1.79

$2.60 - $6.35
 
15,200

 
0.52
 
$
4.48

 
15,200

 
$
4.48

Totals
 
4,071,333

 
8.23
 
$
0.58

 
3,121,333

 
$
0.65