Stock-Based Compensation - Schedule of Stock Option Activity (Details)
|
12 Months Ended |
|
Dec. 31, 2017
USD ($)
$ / shares
shares
|
|---|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
|
| Number of shares, Outstanding beginning balance | shares |
425,411
|
| Number of shares, Granted | shares |
808,200
|
| Number of shares, Exercised | shares |
(23,333)
|
| Number of shares, Expired, forfeited or cancelled | shares |
(659,744)
|
| Number of shares, Outstanding ending balance | shares |
550,534
|
| Number of shares, Exercisable | shares |
408,651
|
| Weighted Average Exercise Price, Outstanding beginning balance |
$ 4.93
|
| Weighted Average Exercise Price, Granted |
4.55
|
| Weighted Average Exercise Price, Exercised |
4.50
|
| Weighted Average Exercise Price, Expired, forfeited or cancelled |
4.97
|
| Weighted Average Exercise Price, Outstanding ending balance |
4.34
|
| Weighted Average Exercise Price, Exercisable |
4.25
|
| Weighted Average Grant Date Fair Value, Outstanding beginning balance |
3.85
|
| Weighted Average Grant Date Fair Value, Granted |
1.63
|
| Weighted Average Grant Date Fair Value, Exercised |
1.86
|
| Weighted Average Grant Date Fair Value, Expired, forfeited or cancelled |
2.15
|
| Weighted Average Grant Date Fair Value, Outstanding ending balance |
2.72
|
| Weighted Average Grant Date Fair Value, Exercisable |
$ 3.09
|
| Weighted Average Remaining Contractual Term (Years) |
2 years 6 months
|
| Weighted Average Exercisable Contractual Term (Years) |
1 year 10 months 25 days
|
| Aggregate Intrinsic Value | $ |
$ 417,407
|
| Aggregate Intrinsic Value | $ |
$ 348,699
|