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Note 13 - Share-based Compensation (Tables) | 9 Months Ended
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Jun. 30, 2018
Notes Tables |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding October 1, 2017 |  |  | 4,663,502 |  |  | $ | 2.16 |
Granted |  |  | 3,500 |  |  | $ | 2.21 |
Forfeited/expired |  |  | (87,083 | ) |  | $ | 2.79 |
Exercised |  |  | (579,653 | ) |  | $ | 1.77 |
Outstanding June 30, 2018 |  |  | 4,000,266 |  |  | $ | 2.20 |
Exercisable June 30, 2018 |  |  | 2,894,363 |  |  | $ | 2.30 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
|  | Three months ended |  |  | Nine months ended |
|  | June 30, |  |  | June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Cost of revenues |  | $ | 5,111 |  |  | $ | 6,192 |  |  | $ | 16,367 |  |  | $ | 17,943 |
Selling, general and administrative |  |  | 123,311 |  |  |  | 272,118 |  |  |  | 352,766 |  |  |  | 856,215 |
Research and development |  |  | 20,391 |  |  |  | 23,462 |  |  |  | 63,930 |  |  |  | 69,765 |
|  | $ | 148,813 |  |  | $ | 301,772 |  |  | $ | 433,063 |  |  | $ | 943,923 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Nine months ended |
|  | June 30, |
|  | 2018 |  |  | 2017 |
Volatility |  |  | 45.4% |  |  |  | 47.5% | - | 53.7% |
Risk free interest rate |  |  | 2.2% |  |  |  | 1.7% | - | 2.0% |
Forfeiture rate |  |  | 10.0% |  |  |  |  | 10.0% |  |
Dividend yield |  |  | 0.0% |  |  |  |  | 0.0% |  |
Expected life in years |  |  | 4.6 |  |  |  | 3.8 | - | 4.6 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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