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Note 7 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Year Ended December 31, 2012 |
Expected term (in years) |  |  | 6.3 |
Volatility |  |  | 104.90 | %
Risk-free interest rate |  |  | 1.00 | %
Dividend yield |  |  | 0.00 | %
Expected forfeitures |  |  | 0.00 | %
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Number of Shares Underlying Options |  |  | Weighted Average Exercise Price |  |  | Number of Shares Underlying Options |  |  | Weighted Average Exercise Price |  |  | Number of Shares Underlying Options |  |  | Weighted Average Exercise Price |
Common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding - beginning of period |  |  | 1,002,350 |  |  | $ | 7.50 |  |  |  | 1,004,750 |  |  | $ | 7.51 |  |  |  | 1,476,491 |  |  | $ | 8.28 |
Options granted |  |  | 359,568 |  |  |  | 1.99 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options exercised |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options forfeited |  |  | (8,700 | ) |  |  | 5.32 |  |  |  | (2,400 | ) |  |  | 8.61 |  |  |  | (74,666 | ) |  |  | 10.37 |
Options expired |  |  | (37,150 | ) |  |  | 8.72 |  |  |  | - |  |  |  | - |  |  |  | (397,075 | ) |  |  | 9.84 |
Options outstanding - end of period |  |  | 1,316,068 |  |  | $ | 5.98 |  |  |  | 1,002,350 |  |  | $ | 7.50 |  |  |  | 1,004,750 |  |  | $ | 7.51 |
Options exercisable at end of period |  |  | 956,500 |  |  | $ | 7.48 |  |  |  | 1,002,350 |  |  | $ | 7.50 |  |  |  | 1,004,750 |  |  | $ | 7.51 |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] |
As of December 31, 2012 |
Number of Options Outstanding |  |  | Exercise Price Per Share |  |  | Remaining Contractual Life |  |  | Number of Options Outstanding That Are Exercisable |  |  | Exercise Price per Share of Options That Are Exercisable |
|  |  |  |  |  | (in years) |  |  |  |  |  |  |
| 921,500 |  |  | $ | 7.64 |  |  | 0.1 |  |  |  | 921,500 |  |  | $ | 7.64 |
| 25,000 |  |  |  | 3.61 |  |  | 0.4 |  |  |  | 25,000 |  |  |  | 3.61 |
| 10,000 |  |  |  | 2.10 |  |  | 0.6 |  |  |  | 10,000 |  |  |  | 2.10 |
| 359,568 |  |  |  | 1.99 |  |  | 8.3 |  |  |  | - |  |  |  | - |
| 1,316,068 |  |  |  |  |  |  |  |  |  |  | 956,500 |  |  |  |  |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value Per Share |  |  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value Per Share |  |  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value Per Share |
Restricted stock - common: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding - beginning of period |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |
Granted |  |  | 432,396 |  |  |  | 1.65 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested |  |  | (432,396 | ) |  |  | 1.65 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Outstanding - end of period |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value Per Share |  |  | Number of Shares |  |  | Weighted- Grant Date Average Fair Value Per Share |  |  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value Per Share |
Restricted stock - common: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding - beginning of period |  |  | 10,000 |  |  | $ | 4.94 |  |  |  | 33,000 |  |  | $ | 5.74 |  |  |  | 66,000 |  |  | $ | 6.36 |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested |  |  | (10,000 | ) |  |  | 4.94 |  |  |  | (23,000 | ) |  |  | 6.08 |  |  |  | (33,000 | ) |  |  | 6.97 |
Outstanding - end of period |  |  | - |  |  | $ | - |  |  |  | 10,000 |  |  | $ | 4.94 |  |  |  | 33,000 |  |  | $ | 5.74 |

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- Definition Tabular disclosure of the following for fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position: the number, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term of options (or share units) outstanding. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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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