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Warrants, Restricted Stock, Restricted Stock Units, Options and Option Matching Rights (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Option Activity
The following table reflects stock option activity in 2018, 2017 and 2016:
 

Number of
shares
 
Range of exercise
prices per share
 
Weighted
average exercise
price per share
 
Weighted
average remaining
contractual life (years)
Options outstanding at December 31, 2015
56,600

 
$7.95 - $131.10

 
$
48.50

 
2.61

Options exercised in 2016
(18,000
)
 
$7.95-$9.90

 
 
 
 
Forfeited in 2016
(5,000
)
 
$14.85 -$82.95

 
 
 
 
Options outstanding at December 31, 2016
33,600

 
$7.95 - $131.10

 
$
68.92

 
1.11

Options exercised in 2017
(2,000
)
 
$7.95
 
 
 
 
Forfeited in 2017
(18,300
)
 
$14.85 -$131.10

 
 
 
 
Options outstanding at December 31, 2017
13,300

 
$15.00 - $40.05

 
$
26.03

 
0.74

Options exercised in 2018
(1,700
)
 
$15.00
 
 
 
 
Forfeited in 2018
(11,600
)
 
$24.75 -$40.05

 
 
 
 
Options outstanding at December 31, 2018
—

 
—

 
$
—

 
—
Schedule of Restricted Stock and Restricted Stock Units Activity
The following table reflects restricted stock and restricted stock unit activity in 2018, 2017 and 2016:

 
 
Number of Restricted Shares
 
Number of Restricted Stock Units
Outstanding at December 31, 2015
 
137,000

 
—

Grants in 2016
 
105,000

 
—

Vested in 2016
 
(22,000
)
 
—

Forfeited in 2016
 
(4,000
)
 
—

Outstanding at December 31, 2016
 
216,000

 
—

Grants in 2017
 
1,000

 
74,500

Vested in 2017
 
(55,000
)
 
—

Forfeited in 2017
 
(22,000
)
 
(1,600
)
Outstanding at December 31, 2017
 
140,000

 
72,900

Grants in 2018
 
—

 
161,200

Vested in 2018
 
(56,500
)
 
(18,600
)
Forfeited in 2018
 
(46,000
)
 
(20,000
)
Outstanding at December 31, 2018
 
37,500

 
195,500