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Common Stock (Tables)
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9 Months Ended |
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Sep. 30, 2013
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
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| Summary of Stockholders Equity Activity |
The following table summarizes stockholders’ equity activity
for the nine months ended September 30, 2013
($000’s):
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Common
Shares |
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Additional
Paid-in
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Deficit
accumulated
during
development
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Total
Stockholders’
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Shares |
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Amount |
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Capital |
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stage |
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equity |
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Balance at December 31, 2012
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24,400,754 |
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$ |
24 |
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$ |
106,193 |
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$ |
(84,184 |
) |
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$ |
22,033 |
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Exercise of Common Stock options
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400,157 |
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1 |
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679 |
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— |
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680 |
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Exercise of Common Stock warrants
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81,045 |
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— |
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— |
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— |
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— |
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Sale of Common Stock under ATM programs
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10,352,219 |
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10 |
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87,996 |
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— |
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88,006 |
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Issuance of Common Stock related to the ESPP
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21,505 |
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— |
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83 |
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— |
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83 |
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Stock-based compensation expense
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— |
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— |
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4,072 |
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— |
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4,072 |
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Net loss
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— |
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— |
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— |
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(27,360 |
) |
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(27,360 |
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Balance at September 30, 2013
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35,255,680 |
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$ |
35 |
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$ |
199,023 |
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$ |
(111,544 |
) |
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$ |
87,514 |
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| Components of Stock-Based Compensation Expenses |
Compensation Expense. The following table summarizes the
stock-based compensation expense from awards, including stock
options and restricted Common Stock awards to employees and
non-employees, compensation expense for the ESPP and warrants to
non-employees for the nine months ended September 30, 2013 and
2012, and from the period June 28, 2006 (date of inception) to
date.
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For the nine months ended
September 30, |
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Period from
June 28, 2006
(date of
inception) to
September 30,
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| ($ in thousands) |
|
2013 |
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2012 |
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2013 |
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Employee awards
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$ |
3,174 |
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$ |
1,336 |
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$ |
6,380 |
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Non-employee awards
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758 |
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412 |
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4,171 |
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Non-employee warrants
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140 |
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425 |
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1,033 |
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Total stock-based compensation expense
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$ |
4,072 |
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$ |
2,173 |
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$ |
11,584 |
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| Summary of Stock Option Activity |
The following table summarizes stock option activity since
December 31, 2012:
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Outstanding Options |
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Weighted
Average
Remaining
Contractual
Life (in
years) |
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| ($ in thousands except per share
amounts) |
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Number of
Shares |
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Weighted
Average
Exercise
Price |
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Total
Weighted
Average
Intrinsic
Value |
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At December 31, 2012
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2,519,070 |
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$ |
3.37 |
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$ |
2,860 |
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8.5 |
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Options granted
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2,031,590 |
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6.07 |
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Options exercised
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(400,157 |
) |
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1.70 |
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Options cancelled
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(20,000 |
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1.93 |
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At September 30, 2013
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4,130,503 |
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$ |
4.87 |
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$ |
8,830 |
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8.6 |
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Options vested and expected to vest
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4,130,503 |
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$ |
4.87 |
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$ |
8,830 |
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8.6 |
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Options vested and exercisable
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1,080,899 |
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$ |
3.95 |
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$ |
4,269 |
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7.7 |
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