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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Option Valuation Assumptions
The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing formula that uses assumptions noted in the following table. Expected volatilities and risk-free interest rates are based upon the expected life of the grant.
 
Assumptions
 
2016

 
2015

 
2014

Expected dividends
 
0
%
 
0
%
 
0
%
Risk free rate
 
1.14
%
 
1.11
%
 
0.74% – 1.2%

Expected volatility
 
68.0% - 71.3%

 
52.7% - 68.3%

 
44.0% - 53.0%

Expected term (in years)
 
3.1 – 3.3 years

 
3.2 – 3.3 years

 
3.2 - 3.3 years
Schedule of Stock Option Transactions
Stock option transactions in each of the past three years under the aforementioned plans in total were:
 
 
 
Shares
 
Exercise
Price Per Share
 
Weighted
Average
Exercise
Price
January 1, 2014 shares issuable under options
 
2,643,500

 
$ .55 - $3.03

 
$
1.12

Granted
 
397,500

 
2.96 - 10.55

 
5.89

Exercised
 
(443,166
)
 
.55 - 1.95

 
1.15

Expired
 
—

 
—

 
—

Forfeited
 
(161,000
)
 
1.10 - 5.65

 
2.71

December 31, 2014 shares issuable under options
 
2,436,834

 
.76 - 10.55

 
1.79

Granted
 
1,357,000

 
5.55 - 10.67

 
9.20

Exercised
 
(75,766
)
 
.76 - 3.62

 
1.10

Expired
 
—

 
—

 
—

Forfeited
 
(125,334
)
 
1.40 – 10.67

 
8.99

December 31, 2015 shares issuable under options
 
3,592,734

 
.79 - 10.67

 
4.36

Granted
 
739,135

 
4.72 - 8.81

 
7.26

Exercised
 
(61,834
)
 
1.10 - 6.51

 
1.54

Expired
 
—

 
—

 
—

Forfeited
 
(164,666
)
 
4.55 - 10.67

 
8.37

December 31, 2016 shares issuable under options
 
4,105,369

 
$ .79 - $10.67

 
4.76
Schedule of Outstanding and Exercisable Stock Options
The following table summarizes information concerning outstanding and exercisable options as of December 31, 2016:
 
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise Price
 
Number of
Options
 
Weighted
Average
Remaining
Life (Years )
 
Weighted
Average
Exercise
Price
 
Number of
Options
 
Weighted
Average
Exercise
Price
$0.79 to $1.00
 
50,000

 
3.01
 
$
0.79

 
50,000

 
$
0.79

1.01 to 1.50
 
1,808,400

 
5.11
 
1.07

 
1,808,400

 
1.07

1.51 to 10.67
 
2,246,969

 
8.35
 
7.82

 
805,803

 
7.15

 
 
 
 
 
 
 
 
 
 
 
$0.79 to $10.67
 
4,105,369

 
6.86
 
$
4.76

 
2,664,203

 
$
2.90

 
The following table summarizes information concerning outstanding and exercisable options as of December 31, 2015:
 
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise Price
 
Number of
Options
 
Weighted
Average
Remaining
Life (Years )
 
Weighted
Average
Exercise
Price
 
Number of
Options
 
Weighted
Average
Exercise
Price
$0.79 to $1.00
 
50,000

 
4.01
 
$
0.79

 
50,000

 
$
0.79

1.01 to 1.50
 
1,862,400

 
6.14
 
1.07

 
1,851,400

 
1.07

1.51 to 10.67
 
1,680,334

 
8.96
 
8.10

 
289,997

 
4.02

 
 
 
 
 
 
 
 
 
 
 
$0.79 to $10.67
 
3,592,734

 
7.43
 
$
4.36

 
2,191,397

 
$
1.45


The following table summarizes information concerning outstanding and exercisable options as of December 31, 2014:
 
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise Price
 
Number of
Options
 
Weighted
Average
Remaining
Life (Years )
 
Weighted
Average
Exercise
Price
 
Number of
Options
 
Weighted
Average
Exercise
Price
$0.76 to $1.00
 
97,000

 
3.04
 
$
0.78

 
97,000

 
$
0.78

1.01 to 1.50
 
1,887,500

 
7.14
 
1.07

 
1,448,664

 
1.08

1.51 to 10.55
 
452,334

 
8.68
 
5.02

 
110,333

 
1.78

 
 
 
 
 
 
 
 
 
 
 
$0.76 to $10.55
 
2,436,834

 
7.26
 
$
1.79

 
1,655,997

 
$
1.11
Nonvested Stock Option Activity
A summary of non-vested options at December 31, 2016 and changes during the year ended December 31, 2016 is presented below:
 
 
 
Options
 
Weighted
Average
Grant Date
Fair Value
Non-vested options at January 1, 2016
 
1,401,337

 
$
3.60

Granted
 
739,135

 
3.45

Vested
 
(574,469
)
 
3.46

Forfeited
 
(124,837
)
 
3.42

Non-vested options at December 31, 2016
 
1,441,166

 
$
3.58
Schedule of Nonvested Shares of Restricted Stock
A summary of non-vested shares of restricted stock and changes during each of the past three years is as follows:
 
 
 
Number of
Restricted Stock
 
Weighted Average
Issuance Price
Non-vested balance at January 1, 2014
 
246,001

 
$
2.64

 
 
 
 
 
Changes during the period:
 
 

 
 

Shares granted
 
—

 
—

Shares vested
 
(137,667
)
 
2.46

Shares forfeited
 
—

 
 

Non-vested balance at January 1, 2015
 
108,334

 
$
2.86

 
 
 
 
 
Changes during the period:
 
 

 
 

Shares granted
 
32,500

 
10.67

Shares vested
 
(140,834
)
 
4.66

Shares forfeited
 
—

 
 

Non-vested balance at December 31, 2015
 
—

 
$
—

 
There has been no activity in the year ended 2016. A summary of non-vested RSUs and changes during each of the past three years is as follows:

 
 
Number of
RSUs
 
Weighted Average
Issuance Price
Non-vested balance at January 1, 2015
 
—

 
$
—

 
 
 
 
 
Changes during the period:
 
 

 
 

Shares granted
 
230,250

 
10.32

Shares vested
 
(32,500
)
 
10.67

Shares forfeited
 
(15,000
)
 
10.67

Non-vested balance at December 31, 2015
 
182,750

 
$
10.23

 
 
 
 
 
Changes during the period:
 
 
 
 
Shares granted
 
58,068

 
7.50

Shares vested
 
(60,918
)
 
10.13

Shares forfeited
 
—

 
—

Non-vested balance at December 31, 2016
 
179,900

 
$
9.35