7. STOCK- BASED COMPENSATION (Details 2) (USD $) | 3 Months Ended | |
Jun. 30, 2014 | Jun. 30, 2013 | Mar. 31, 2014 |
Stock-Based Compensation | ' | ' | ' |
Weighted average fair value per underlying share of options granted (in dollars per share) | $2.34 | $2.45 | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price (in dollars per share) | $5.14 | ' | $5.13 |
Number of Shares Underlying Options Outstanding (in shares) | 6,172,535 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $5.14 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '5 years 9 months 7 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 4,085,844 | ' | ' |
$2.43 - $3.38 | ' | ' | ' |
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) | $3.38 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 628,219 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $3.02 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '4 years 3 months 18 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 628,219 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $3.02 | ' | ' |
$3.43 - $3.94 | ' | ' | ' |
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) | $3.94 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 469,266 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $3.55 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '4 years 9 months 4 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 469,266 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $3.55 | ' | ' |
$4.00 | ' | ' | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price (in dollars per share) | $4 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 669,303 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $4 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '4 years 10 months 28 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 669,303 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $4 | ' | ' |
$4.17 - $4.50 | ' | ' | ' |
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) | $4.50 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 633,245 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $4.26 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '5 years 4 months 6 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 384,517 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $4.32 | ' | ' |
$4.81 - $4.92 | ' | ' | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price, low end of range (in dollars per share) | $4.81 | ' | ' |
Exercise Price, high end of range (in dollars per share) | $4.92 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 507,885 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $4.87 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '7 years 8 months 5 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 164,730 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $4.87 | ' | ' |
$5.50 | ' | ' | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price (in dollars per share) | $5.50 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 801,433 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $5.50 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '2 years 4 months 13 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 801,433 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $5.50 | ' | ' |
$5.59 - $5.76 | ' | ' | ' |
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) | $5.76 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 675,410 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $5.70 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '7 years 3 months 11 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 222,171 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $5.71 | ' | ' |
$6.00 - $6.54 | ' | ' | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price, low end of range (in dollars per share) | $6 | ' | ' |
Exercise Price, high end of range (in dollars per share) | $6.54 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 799,483 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $6.32 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '6 years 10 months 24 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 385,217 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $6.19 | ' | ' |
$6.61 - $6.86 | ' | ' | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price, low end of range (in dollars per share) | $6.61 | ' | ' |
Exercise Price, high end of range (in dollars per share) | $6.86 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 666,978 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $6.77 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '8 years 7 months 21 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 90,580 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $6.83 | ' | ' |
$7.00 - $9.20 | ' | ' | ' |
Options outstanding by exercise price | ' | ' | ' |
Exercise Price, low end of range (in dollars per share) | $7 | ' | ' |
Exercise Price, high end of range (in dollars per share) | $9.20 | ' | ' |
Number of Shares Underlying Options Outstanding (in shares) | 321,313 | ' | ' |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $7.78 | ' | ' |
Options Outstanding, Weighted Average Remaining Contractual Life | '6 years 2 months 27 days | ' | ' |
Options Exercisable, Number Vested and Exercisable (in shares) | 270,408 | ' | ' |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $7.51 | ' | ' |