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Basis of Presentation (Tables) | 12 Months Ended
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Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of computation of basic and diluted net income (loss) per share | The following table sets forth the computation of basic and diluted net income (loss) per share for the periods indicated (in thousands, except per share amounts):
| Year Ended December 31,
| 2013 |  | 2012 |  | 2011
Net income (loss) from continuing operations | $ | 8,832 |  |  | $ | (2,674 | ) |  | $ | 9,712 |
Discontinued operations | 2,588 |  |  | 2,147 |  |  | 3 |
Net income (loss) | $ | 11,420 |  |  | $ | (527 | ) |  | $ | 9,715 |
Shares used to compute basic income (loss) per share | 20,312,395 |  |  | 19,853,095 |  |  | 19,655,632 |
Dilutive potential common shares: |  |  |  |  |
Restricted stock | 352,959 |  |  | — |  |  | — |
Stock options | 80,100 |  |  | — |  |  | 57,688 |
Shares used to compute diluted income (loss) per share | 20,745,454 |  |  | 19,853,095 |  |  | 19,713,320 |
Basic per share amounts: |  |  |  |  |
Income (loss) from continuing operations | $ | 0.43 |  |  | $ | (0.14 | ) |  | $ | 0.49 |
Discontinued operations | 0.13 |  |  | 0.11 |  |  | — |
Net income (loss) | $ | 0.56 |  |  | $ | (0.03 | ) |  | $ | 0.49 |
Diluted per share amounts: |  |  |  |  |
Income (loss) from continuing operations | $ | 0.43 |  |  | $ | (0.14 | ) |  | $ | 0.49 |
Discontinued operations | 0.12 |  |  | 0.11 |  |  | — |
Net income (loss) | $ | 0.55 |  |  | $ | (0.03 | ) |  | $ | 0.49 |
Summary of investment categories | The following table summarizes the various investment categories at December 31, 2013 and December 31, 2012 (in thousands):
| Cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Estimated fair value
December 31, 2013 |  |  |  |  |  |  |
Short-term investments | $ | 1,426 |  |  | $ | 2,914 |  |  | $ | — |  |  | $ | 4,340 |
Certificates of deposit - restricted | 1,341 |  |  | — |  |  | — |  |  | 1,341 |
| $ | 2,767 |  |  | $ | 2,914 |  |  | $ | — |  |  | $ | 5,681 |
December 31, 2012 |  |  |  |  |  |  |
Available-for-sale securities-restricted | $ | 1,426 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,426 |
Certificates of deposit-restricted | 1,341 |  |  | — |  |  | — |  |  | 1,341 |
| $ | 2,767 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,767 |
Summary of property and equipment | Property and equipment is stated at cost and consists of the following (in thousands):
| December 31,
| 2013 |  | 2012
Lab and office equipment | $ | 3,737 |  |  | $ | 4,374 |
Leasehold improvements | 387 |  |  | 145 |
Computer equipment and software | 616 |  |  | 1,150 |
| 4,740 |  |  | 5,669 |
Less accumulated depreciation and amortization | (3,873 | ) |  | (4,881 | )
| $ | 867 |  |  | $ | 788 |
Summary of goodwill and other identifiable intangible assets | Goodwill and other identifiable intangible assets consist of the following (in thousands):
| December 31,
| 2013 |  | 2012
Indefinite lived intangible assets |  |  |
Acquired in-process research and development | $ | 12,556 |  |  | $ | 13,036 |
Goodwill | 12,238 |  |  | 12,238 |
Definite lived intangible assets |  |  |
Complete technology | 15,267 |  |  | 15,227 |
Less: Accumulated amortization | (2,235 | ) |  | (1,473 | )
Trade name | 2,642 |  |  | 2,642 |
Less: Accumulated amortization | (387 | ) |  | (256 | )
Customer relationships | 29,600 |  |  | 29,600 |
Less: Accumulated amortization | (4,344 | ) |  | (2,864 | )
Total goodwill and other identifiable intangible assets, net | $ | 65,337 |  |  | $ | 68,150 |
Stock option weighted average assumptions | The fair-value for options that were awarded to employees and directors was estimated at the date of grant using the Black-Scholes option valuation model with the following weighted average assumptions:
| Year Ended December 31,
| 2013 |  | 2012 |  | 2011
Risk-free interest rate | 1.13%-1.82% |  | 0.83%-1.14% |  | 1.09%-2.61%
Dividend yield | — |  | — |  | —
Expected volatility | 70% |  | 69% |  | 69%
Expected term | 6 years |  | 6 years |  | 6 years
Forfeiture rate | 8.4%-9.8% |  | 8.0%-11.2% |  | 8.9%-14.1%
Schedule for accounting for share-based compensation | The following table summarizes share-based compensation expense recorded as components of research and development expenses and general and administrative expenses for the periods indicated (in thousands):
| December 31,
| 2013 |  | 2012 |  | 2011
Share-based compensation expense as a component of: |  |  |  |  |
Research and development expenses | $ | 1,705 |  |  | $ | 1,448 |  |  | $ | 1,072 |
General and administrative expenses | 3,961 |  |  | 2,619 |  |  | 2,279 |
| $ | 5,666 |  |  | $ | 4,067 |  |  | $ | 3,351 |

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