|
WARRANTS AND DERIVATIVE WARRANT LIABILITY (Details) (USD $)
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9 Months Ended |
12 Months Ended |
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Sep. 30, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Number of shares, Outstanding at beginning of period (in shares) |
10,216,597 |
8,513,984 |
8,715,289 |
| Number of shares, Granted (in shares) |
11,467,847 |
4,376,228 |
314,366 |
| Number of shares, Exercised (in shares) |
0 |
(1,325,670) |
(515,671) |
| Number of shares, Forfeited (in shares) |
(1,786,516) |
(1,347,945) |
0 |
| Number of shares, Outstanding at ending of period (in shares) |
19,897,928 |
10,216,597 |
8,513,984 |
| Number of shares, Exercisable at end of period (in shares) |
19,897,928 |
10,216,597 |
|
| Weighted-average exercise price, Outstanding at beginning of period (in dollars per share) |
$ 2.56 |
$ 2.47 |
$ 2.39 |
| Weighted-average exercise price, Granted (in dollars per share) |
$ 0.95 |
$ 1.97 |
$ 2.97 |
| Weighted-average exercise price, Exercised (in dollars per share) |
$ 0 |
$ 1.06 |
$ 1.52 |
| Weighted-average exercise price, Forfeited (in dollars per share) |
$ 2.85 |
$ 1.52 |
$ 0 |
| Weighted-average exercise price, Outstanding at end of period (in dollars per share) |
$ 1.61 |
$ 2.56 |
$ 2.47 |
| Weighted-average exercise price, Exercisable at end of period (in dollars per share) |
$ 1.61 |
$ 2.56 |
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| Weighted-average remaining contractual term, Outstanding |
2 years 1 month 6 days |
2 years 10 months 24 days |
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| Weighted-average remaining contractual term, Exercisable |
2 years 1 month 6 days |
2 years 10 months 24 days |
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| Aggregate intrinsic value, Outstanding (in dollars) |
$ 17,000 |
$ 48,000 |
|
| Aggregate intrinsic value, Exercisable (in dollars) |
$ 17,000 |
$ 48,000 |
|