STOCK-BASED COMPENSATION - Stock Option Awards Outstanding and Exercisable (Detail)
|
12 Months Ended |
|
Dec. 31, 2015
$ / shares
shares
|
|---|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Options Outstanding | shares |
4,263,166
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
8 years 22 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 3.01
|
| Options Exercisable | shares |
1,915,827
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 3.58
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
7 years 3 months 11 days
|
| Range of Exercise Prices $0.00 - 0.50 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 0.00
|
| Range of Exercise Prices, Maximum |
$ 0.50
|
| Options Outstanding | shares |
325,000
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
9 years 9 months 22 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 0.30
|
| Options Exercisable | shares |
49,998
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 0.37
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
9 years 9 months
|
| Range of Exercise Prices $0.51 - 1.00 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 0.51
|
| Range of Exercise Prices, Maximum |
$ 1.00
|
| Options Outstanding | shares |
3,500
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
9 years 7 months 10 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 0.63
|
| Options Exercisable | shares |
0
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 0
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
0 years
|
| Range of Exercise Prices $1.01 - 1.50 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 1.01
|
| Range of Exercise Prices, Maximum |
$ 1.50
|
| Options Outstanding | shares |
718,000
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
9 years 3 months 29 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 1.39
|
| Options Exercisable | shares |
27,500
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 1.40
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
9 years 4 months 17 days
|
| Range of Exercise Prices $1.51 - 2.00 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 1.51
|
| Range of Exercise Prices, Maximum |
$ 2.00
|
| Options Outstanding | shares |
25,000
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
2 years
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 2.00
|
| Options Exercisable | shares |
25,000
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 2.00
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
2 years
|
| Range of Exercise Prices $2.01 - 2.50 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 2.01
|
| Range of Exercise Prices, Maximum |
$ 2.50
|
| Options Outstanding | shares |
162,500
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
8 years 11 months 23 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 2.20
|
| Options Exercisable | shares |
30,833
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 2.20
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
8 years 11 months 23 days
|
| Range of Exercise Prices $2.51 - 3.00 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 2.51
|
| Range of Exercise Prices, Maximum |
$ 3.00
|
| Options Outstanding | shares |
67,500
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
8 years 8 months 12 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 2.62
|
| Options Exercisable | shares |
57,500
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 2.64
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
8 years 8 months 16 days
|
| Range of Exercise Prices $3.01 - 3.50 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 3.01
|
| Range of Exercise Prices, Maximum |
$ 3.50
|
| Options Outstanding | shares |
740,000
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
6 years 4 months 6 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 3.18
|
| Options Exercisable | shares |
428,333
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 3.18
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
5 years
|
| Range of Exercise Prices $3.51 - 4.00 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 3.51
|
| Range of Exercise Prices, Maximum |
$ 4.00
|
| Options Outstanding | shares |
595,000
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
8 years 2 months 1 day
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 3.66
|
| Options Exercisable | shares |
209,999
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 3.67
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
8 years 2 months 1 day
|
| Range of Exercise Prices $4.01 - 4.50 |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Range of Exercise Prices, Minimum |
$ 4.01
|
| Range of Exercise Prices, Maximum |
$ 4.50
|
| Options Outstanding | shares |
1,626,666
|
| Options Outstanding, Weighted Average Remaining Contractual Life |
7 years 10 months 6 days
|
| Options Outstanding, Weighted Average Exercise Price Per Share |
$ 4.05
|
| Options Exercisable | shares |
1,086,664
|
| Options Exercisable, Weighted Average Exercise Price Per Share |
$ 4.05
|
| Options Exercisable, Weighted Average Remaining Contractual Life (in Years) |
7 years 10 months 2 days
|