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Share-based Payments (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity
The following table sets forth the activity of our outstanding options:
 
Number of Options
 
Weighted Average Exercise Price per Share
December 31, 2014
241,766

 
$
2.69

Exercised
(26,224
)
 
4.21

Forfeited or canceled
(10,574
)
 
6.30

December 31, 2015
204,968

 
2.30

Granted
695,187

 
10.04

Exercised
(34,464
)
 
1.71

Forfeited or canceled
(2,714
)
 
5.47

December 31, 2016
862,977

 
8.55

Granted
567,227

 
14.30

Exercised
(49,126
)
 
2.16

December 31, 2017
1,381,078

 
$
11.14
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
We calculated the grant date fair value of the stock options granted under the 2016 Equity Incentive Plan using a Monte Carlo simulation and amortize the resulting compensation expense over the respective vesting or service period. The fair value of stock options granted was determined using the following assumptions:
 
Year ended December 31, 2017
 
Year ended December 31, 2016
Risk free interest rate (1)
2.05%
 
1.38%
Common stock dividend yield
4.20%
 
5.98%
Expected volatility (2)
36.67%
 
38.47%
_____________
(1)
Represents the interest rate as of the grant date on US treasury bonds having the same life as the estimated life of the stock option grants.
(2)
Based on our historical stock price volatility.
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table sets forth the activity of our restricted stock:
 
 
Number of Shares
 
Weighted Average Grant Date Fair Value
December 31, 2014
 
8,245

 
$
27.28

Granted
 
9,924

 
18.14

Vested (1)
 
(7,644
)
 
27.28

Forfeit
 
(601
)
 
27.28

December 31, 2015
 
9,924

 
18.14

Granted
 
274,760

 
9.94

Vested (1)
 
(10,531
)
 
17.20

Forfeit
 
(7,255
)
 
9.84

December 31, 2016
 
266,898

 
9.97

Granted
 
271,633

 
14.30

Vested (1)
 
(101,487
)
 
9.96

Canceled
 
(17,802
)
 
11.80

December 31, 2017
 
419,242

 
$
12.70

___________________
(1) The vesting date fair value of restricted stock that vested during the years ended December 31, 2017, 2016 and 2015 was $1.3 million, $0.1 million and $0.1 million, respectively.
Schedule of Share-based Compensation, Shares Reserved for Future Issuance
The following table sets forth the number of shares of common stock reserved for future issuance. We generally will issue new shares upon the exercise of stock options or the vesting of restricted stock.
 
 
December 31, 2017
Stock options outstanding
 
1,381,078

Possible future issuances under share-based compensation plans
 
1,290,603

 
 
2,671,681