SHARE-BASED AWARDS (Schedule of Stock Options) (Details) - USD ($)
$ / shares in Units, $ in Thousands |
|
12 Months Ended |
Feb. 18, 2014 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Number of Shares |
|
|
|
| Outstanding, beginning balance |
|
7,459,046
|
|
| Granted |
3,479,604
|
|
|
| Exercised |
|
|
|
| Forfeited |
|
(4,241,959)
|
|
| Outstanding, ending balance |
|
3,217,087
|
7,459,046
|
| Expected to vest |
|
3,217,087
|
|
| Exercisable |
|
2,991,291
|
|
| Weighted Average Exercise Price |
|
|
|
| Outstanding, beginning balance |
|
$ 2.98
|
|
| Granted |
$ 2.04
|
0
|
|
| Exercised |
|
0
|
|
| Forfeited |
|
1.37
|
|
| Outstanding, ending balance |
|
5.11
|
$ 2.98
|
| Expected to vest |
|
5.11
|
|
| Exercisable |
|
5.11
|
|
| Weighted Average Grant-date Fair Value |
|
|
|
| Outstanding, beginning balance |
|
0.72
|
|
| Granted |
|
0
|
|
| Exercised |
|
0
|
|
| Forfeited |
|
0.65
|
|
| Outstanding, ending balance |
|
0.81
|
$ 0.72
|
| Expected to vest |
|
0.81
|
|
| Exercisable |
|
$ 0.81
|
|
| Weighted Average Remaining Contractual Term (Years) |
|
|
|
| Outstanding |
|
13 years 1 month 17 days
|
5 years 8 months 26 days
|
| Granted |
|
0 years
|
|
| Exercised |
|
0 years
|
|
| Forfeited |
|
1 month 17 days
|
|
| Expected to vest |
|
13 years 1 month 17 days
|
|
| Exercisable |
|
13 years 1 month 17 days
|
|
| Aggregate Intrinsic Value |
|
|
|
| Outstanding at Begining of the period |
|
$ 0
|
|
| Exercised |
|
0
|
|
| Expected to vest |
|
0
|
|
| Exercisable |
|
0
|
|
| Outstanding at Ending of the period |
|
$ 0
|
$ 0
|