STOCK-BASED COMPENSATION - Stock Option Awards Outstanding and Exercisable (Detail) | 12 Months Ended |
Dec. 31, 2015$ / sharesshares |
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 |
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 |
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 |
Options Outstanding | shares | 25,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 2 years |
Options Outstanding, Weighted Average Exercise Price Per Share | $ 2 |
Options Exercisable | shares | 25,000 |
Options Exercisable, Weighted Average Exercise Price Per Share | $ 2 |
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 |
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 |
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 |