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EMPLOYEE STOCK OPTION PLANS (Tables) | 12 Months Ended
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Dec. 31, 2012
EMPLOYEE STOCK OPTION PLANS [Abstract] |
Weighted-average assumptions used for options granted | The estimated fair value of each option award granted was determined on the date of grant using the Black-Scholes option valuation model. The following weighted average assumptions were used for option grants during the years ended December 31, 2012, 2011 and 2010:
| 2012 | 2011 | 2010
Risk-free interest rate | 0.90% | 2.08% | 2.55%
Expected volatility | 101.8% | 100.9% | 97.0%
Dividend yield | 0% | 0% | 0%
Expected option term-in years | 5 | 5 | 5
Stock option activity | A summary of the status of the Company's stock option plans is as follows:
Fixed Options | Optionssns | Weighted average Exercise Price | Weighted average remaining contractual term (in years) | Aggregate Intrinsic Value
Outstanding |  |  |  |
at January 1, 2010 | 1,052,333 | $6.47 | 3.91 |
Granted during period | 80,000 | 7.38 |  |
Exercised | (272,000) | 5.11 |  |
Forfeited/Expired | (80,000) | 10.01 |  |
Outstanding |  |  |  |
at December 31, 2010 | 780,333 | $6.68 | 2.92 |
Granted during period | 80,000 | 14.90 |  |
Exercised | (165,333) | 3.72 |  |
Forfeited/Expired | --- | --- |  |
Outstanding |  |  |  |
at December 31, 2011 | 695,000 | $8.33 | 2.66 |
Granted during period | 40,517 | 11.87 |  |
Exercised | (240,000) | 6.85 |  |
Forfeited/Expired | --- | --- |  |
Outstanding and expected to vest |  |  |  |
at December 31, 2012 | 495,517 | 9.33 | 2.73 | 858,997
Vested |  |  |  |
at December 31, 2012 | 495,517 | 9.33 | 2.73 | 858,997

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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 stock options, including, but not limited to: (a) expected term of share options and similar instruments, (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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