Stock Option Activity Under Equity Incentive Plan |
Activity under
the 2004 Plan is set forth below:
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Shares
Available
for Grant
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Outstanding
Options |
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Weighted
Average
Exercise
Price
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Number of
Shares
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Exercise
Price
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Balances, December 31,
2009
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143,505 |
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935,660 |
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$ |
0.42–21.66 |
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1.17 |
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Additional shares
reserved
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2,452,401 |
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— |
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Options granted
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(1,849,500 |
) |
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1,849,500 |
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0.99–1.88 |
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1.45 |
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Options
exercised
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— |
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(20,000 |
) |
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0.79–1.30 |
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1.05 |
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Options canceled
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19,442 |
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(19,442 |
) |
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0.79–1.95 |
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1.61 |
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Balances, December 31,
2010
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765,848 |
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2,745,718 |
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$ |
0.42–3.18 |
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$ |
1.36 |
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Additional shares
reserved
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1,250,000 |
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— |
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Options granted
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(1,196,500 |
) |
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1,196,500 |
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1.53–1.86 |
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1.64 |
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Options
exercised
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— |
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(11,603 |
) |
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0.79–1.44 |
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1.24 |
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Options canceled
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258,436 |
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(258,436 |
) |
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0.79–1.88 |
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1.38 |
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Balances, December 31,
2011
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1,077,784 |
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3,672,179 |
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$ |
0.42–3.18 |
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$ |
1.45 |
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Additional shares
reserved
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1,250,000 |
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— |
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Options granted
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(1,844,000 |
) |
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1,844,000 |
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1.38–$7.75 |
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6.24 |
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Options
exercised
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— |
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(402,580 |
) |
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0.79–$3.08 |
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1.39 |
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Options canceled
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14,627 |
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(14,627 |
) |
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0.79–$6.18 |
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4.25 |
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Balances, December 31,
2012
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498,411 |
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5,098,972 |
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$ |
0.42–$7.75 |
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$ |
3.18 |
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Stock Options Outstanding and Exercisable by Exercise Price |
At
December 31, 2012, stock options outstanding and exercisable
by exercise price were as follows:
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Options
Outstanding |
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Options
Exercisable |
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Range of
Exercise
Prices
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Number
Outstanding
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Weighted
Average
Remaining
Contractual
Life
(Years)
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Weighted
Average
Exercise
Price
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Number
Exercisable
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Weighted
Average
Exercise
Price
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$0.42 – 1.38 |
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664,316 |
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5.31 |
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$ |
1.12 |
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619,876 |
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$ |
1.10 |
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$1.44 –
1.44 |
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1,397,189 |
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7.37 |
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1.44 |
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889,657 |
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1.44 |
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$1.49 –
1.62 |
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180,000 |
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8.23 |
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1.58 |
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76,527 |
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1.61 |
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$1.64 –
1.64 |
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962,095 |
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8.41 |
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1.64 |
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378,651 |
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1.64 |
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$1.69 –
6.85 |
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934,372 |
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9.05 |
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4.93 |
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223,131 |
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4.16 |
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$7.00 –
7.75 |
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961,000 |
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9.34 |
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7.28 |
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127,496 |
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7.22 |
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$0.42 –
7.75 |
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5,098,972 |
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8.01 |
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$ |
3.18 |
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2,315,388 |
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$ |
1.97 |
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Stock-Based Compensation Expense |
Total
stock-based compensation expense was allocated to research and
development and general and administrative as follows (in
thousands):
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Year Ended
December 31, |
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2012 |
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2011 |
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2010 |
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Stock-based compensation
expense:
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Research and
development
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$ |
1,521 |
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$ |
471 |
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$ |
381 |
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General and
administrative
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1,489 |
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568 |
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422 |
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$ |
3,010 |
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$ |
1,039 |
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$ |
803 |
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