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Stock-Based Compensation and Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2013
Compensation expense recognized for issuance of warrants, stock options, restricted stock grants and stock bonuses |
| Three Months Ended
| March 31,
| 2013 | 2012
Stock-based compensation costs included in: |  |
Cost of sales | $ 2 | $ 2
Sales and marketing expenses | 9 | 11
Research and development expenses | 9 | 13
General and administrative expenses | 139 | 135
Total stock-based compensation expenses | $ 159 | $ 161
Values set forth calculated using weighted average assumptions | The values set forth above were calculated using the following weighted average assumptions:
| Three Months Ended
| March 31,
| 2013 | 2012
Expected life | 4.26 years | 4.18 years
Dividend yield | 0 % | 0 %
Expected volatility | 94.6 % | 87.4 %
Risk-free interest rate | 0.6 % | 0.5 to 0.8 %

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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