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Note 10 - Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2013
Stockholders' Equity Note [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | LiqTech International, Inc. |
Expected term (Years) |  |  |  | 4 |  |
Volatility |  |  |  | 40.74 |  |
Risk free interest rate |  |  |  | 0.67% |  |
Dividend yield |  |  |  | 0% |  |
Schedule of Share-based Compensation, Activity [Table Text Block] |
|  |  |  |  |  | Options Outstanding |  |  | Options Exercisable |
| Range of Exercise Prices |  |  | Number Outstanding |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Weighted Average Exercise Price |  |  | Number Exercisable |  |  | Weighted Average Exercise Price |
|  |  | $1.50 |  |  |  | 452,500 |  |  |  | 1.40 |  |  | $ | 1.50 |  |  |  | 452,500 |  |  | $ | 1.50 |
|  |  | $2.35 |  |  |  | 600,000 |  |  |  | 3.50 |  |  | $ | 2,35 |  |  |  | 150,000 |  |  | $ | 2,35 |
| $3.00 | - | $3.60 |  |  |  | 1,511,630 |  |  |  | 1.43 |  |  | $ | 3.06 |  |  |  | 1,440,253 |  |  | $ | 3.04 |
|  | Total |  |  |  |  | 2,564,130 |  |  |  | 1.89 |  |  | $ | 2.62 |  |  |  | 2,042,753 |  |  | $ | 2.65 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] |
|  | September 30, 2013 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Average Remaining Life |  |  | Weighted Average Intrinsic Value |
Outstanding at beginning of period |  |  | 1,964,130 |  |  | $ | 2.70 |  |  |  | 2.15 |  |  | $ | 0 |
Granted |  |  | 600,000 |  |  |  | 2.35 |  |  |  | 3.50 |  |  |  | - |
Exercised |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Expired |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Outstanding at end of period |  |  | 2,564,130 |  |  | $ | 2.62 |  |  |  | 1.89 |  |  | $ | 700,375 |
Vested and expected to vest |  |  | 2,564,130 |  |  | $ | 2.62 |  |  |  | 1.89 |  |  | $ | 700,375 |
Exercisable end of period |  |  | 2,042,753 |  |  | $ | 2.65 |  |  |  | 1.63 |  |  | $ | 565,375 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + 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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- Definition Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible). + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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