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Note 14 - Share-based Compensation (Tables) | 3 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Three months ended December 31, 2017 |
Volatility |  |  | 45.4% |
Risk free interest rate |  |  | 2.2% |
Forfeiture rate |  |  | 10.0% |
Dividend yield |  |  | 0.0% |
Expected life in years |  |  | 4.6 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Number of Shares |
Outstanding September 30, 2018 |  |  | 218,330 |
Granted |  |  | - |
Released |  |  | - |
Forfeited/cancelled |  |  | - |
Outstanding December 31, 2018 |  |  | 218,330 |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding September 30, 2018 |  |  | 3,394,858 |  |  | $ | 2.18 |
Granted |  |  | - |  |  | $ | - |
Forfeited/expired |  |  | (753,334 | ) |  | $ | 2.99 |
Exercised |  |  | (1,600 | ) |  | $ | 1.58 |
Outstanding December 31, 2018 |  |  | 2,639,924 |  |  | $ | 1.94 |
Exerciseable December 31, 2018 |  |  | 1,702,236 |  |  | $ | 1.93 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|  |  |  |  |  |  |  | Weighted Average |  |  | Weighted Average |  |  |  |  |  |  | Weighted Average |
Range of |  | Number |  |  | Remaining |  |  | Exercise |  |  | Number |  |  | Exercise |
Exercise Prices |  | Outstanding |  |  | Contractual Life |  |  | Price |  |  | Exercisable |  |  | Price |
$0.93 | - | $1.69 |  |  | 603,198 |  |  |  | 4.42 |  |  | $ | 1.57 |  |  |  | 583,385 |  |  | $ | 1.57 |
$1.71 | - | $1.86 |  |  | 526,476 |  |  |  | 3.53 |  |  | $ | 1.80 |  |  |  | 455,601 |  |  | $ | 1.81 |
$1.99 | - | $1.99 |  |  | 1,125,000 |  |  |  | 4.58 |  |  | $ | 1.99 |  |  |  | 281,250 |  |  | $ | 1.99 |
$2.02 | - | $3.13 |  |  | 375,250 |  |  |  | 2.72 |  |  | $ | 2.56 |  |  |  | 372,000 |  |  | $ | 2.56 |
$3.17 | - | $3.17 |  |  | 10,000 |  |  |  | 2.88 |  |  | $ | 3.17 |  |  |  | 10,000 |  |  | $ | 3.17 |
|  |  |  |  | 2,639,924 |  |  |  |  |  |  |  |  |  |  |  | 1,702,236 |  |  |  |  |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
|  | Three months ended |
|  | December 31, |
|  | 2018 |  |  | 2017 |
Cost of revenues |  | $ | 4,298 |  |  | $ | 6,209 |
Selling, general and administrative |  |  | 111,851 |  |  |  | 109,322 |
Research and development |  |  | 17,696 |  |  |  | 22,930 |
|  | $ | 133,845 |  |  | $ | 138,461 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + 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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