8. STOCK- BASED COMPENSATION - Options outstanding by exercise price (Details) - $ / shares | 6 Months Ended | |
Sep. 30, 2016 | Mar. 31, 2016 |
Options outstanding by exercise price | | |
Exercise Price (in dollars per share) | $ 5.04 | $ 5.08 |
Number of Shares Underlying Options Outstanding (in shares) | 8,188,387 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.04 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 3 months 15 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 5,361,750 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.04 | |
$2.43 - $3.40 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 2.43 | |
Exercise Price, high end of range (in dollars per share) | $ 3.40 | |
Number of Shares Underlying Options Outstanding (in shares) | 877,604 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 3.17 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 4 years 7 months 10 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 568,794 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 3.04 | |
$3.43 - $4.00 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 3.43 | |
Exercise Price, high end of range (in dollars per share) | $ 4 | |
Number of Shares Underlying Options Outstanding (in shares) | 1,221,409 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 3.80 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 3 years 6 months | |
Options Exercisable, Number Vested and Exercisable (in shares) | 1,060,819 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 3.83 | |
$4.17 - $4.81 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 4.17 | |
Exercise Price, high end of range (in dollars per share) | $ 4.81 | |
Number of Shares Underlying Options Outstanding (in shares) | 923,428 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.41 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 2 months 23 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 833,115 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.40 | |
$4.90 - $4.99 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 4.90 | |
Exercise Price, high end of range (in dollars per share) | $ 4.99 | |
Number of Shares Underlying Options Outstanding (in shares) | 1,451,731 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.97 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 8 years 6 months 18 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 318,403 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.91 | |
$5.13 - $5.50 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 5.13 | |
Exercise Price, high end of range (in dollars per share) | $ 5.50 | |
Number of Shares Underlying Options Outstanding (in shares) | 1,396,146 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.38 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 3 years 7 months 24 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 862,712 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.47 | |
$5.59 - $6.28 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 5.59 | |
Exercise Price, high end of range (in dollars per share) | $ 6.28 | |
Number of Shares Underlying Options Outstanding (in shares) | 949,073 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.88 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 5 months 27 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 712,644 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.92 | |
$6.45 - $6.82 | | |
Options outstanding by exercise price | | |
Exercise Price, low end of range (in dollars per share) | 6.45 | |
Exercise Price, high end of range (in dollars per share) | $ 6.82 | |
Number of Shares Underlying Options Outstanding (in shares) | 741,510 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 6.60 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 5 months 1 day | |
Options Exercisable, Number Vested and Exercisable (in shares) | 602,956 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 6.62 | |
$ 6.86 | | |
Options outstanding by exercise price | | |
Exercise Price (in dollars per share) | $ 6.86 | |
Number of Shares Underlying Options Outstanding (in shares) | 307,913 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 6.86 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 6 years 9 months 29 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 82,734 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 6.86 | |
$ 7 | | |
Options outstanding by exercise price | | |
Exercise Price (in dollars per share) | $ 7 | |
Number of Shares Underlying Options Outstanding (in shares) | 206,193 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 7 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 3 years 10 months 2 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 206,193 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 7 | |
$ 9.20 | | |
Options outstanding by exercise price | | |
Exercise Price (in dollars per share) | $ 9.20 | |
Number of Shares Underlying Options Outstanding (in shares) | 113,380 | |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 9.20 | |
Options Outstanding, Weighted Average Remaining Contractual Life | 4 years 4 months 2 days | |
Options Exercisable, Number Vested and Exercisable (in shares) | 113,380 | |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 9.20 | |