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Note 16 - Stockholders' Equity | 6 Months Ended
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Mar. 31, 2020
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | 1 6 . STOCKHOLDERS’ EQUITY Summary The following tables summarize changes in the components of stockholders’ equity during the three and six months ended March 31, 2020 and the three and six months ended March 31, 2019:
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Additional |  |  |  |  |  |  | Other |  |  | Total |
|  | Common Stock |  |  | Paid-in |  |  | Accumulated |  |  | Comprehensive |  |  | Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Loss |  |  | Equity |
Balance at September 30, 2019 |  |  | 32,949,987 |  |  | $ | 330 |  |  | $ | 89,571,641 |  |  | $ | (53,731,903 | ) |  | $ | (458,719 | ) |  | $ | 35,381,349 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 158,327 |  |  |  | - |  |  |  | - |  |  |  | 158,327 |
Issuance of common stock upon exercise of stock options, net |  |  | 83,343 |  |  |  | 1 |  |  |  | 144,213 |  |  |  | - |  |  |  | - |  |  |  | 144,214 |
Issuance of common stock upon vesting of restricted stock units |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Other comprehensive income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 85,314 |  |  |  | 85,314 |
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 620,327 |  |  |  | - |  |  |  | 620,327 |
Balance at December 31, 2019 |  |  | 33,033,330 |  |  | $ | 331 |  |  | $ | 89,874,181 |  |  | $ | (53,111,576 | ) |  | $ | (373,405 | ) |  | $ | 36,389,531 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 295,290 |  |  |  | - |  |  |  | - |  |  |  | 295,290 |
Issuance of common stock upon exercise of stock options, net |  |  | 56,861 |  |  |  | - |  |  |  | 113,833 |  |  |  | - |  |  |  | - |  |  |  | 113,833 |
Issuance of common stock upon vesting of restricted stock units |  |  | 198,106 |  |  |  | 2 |  |  |  | (2 | ) |  |  | - |  |  |  | - |  |  |  | - |
Shares retained for payment of taxes in connection with net share settlement of restricted stock units |  |  | (13,063 | ) |  |  | - |  |  |  | (41,410 | ) |  |  | - |  |  |  | - |  |  |  | (41,410 | )
Stock buyback |  |  | (156,505 | ) |  |  | (2 | ) |  |  | (398,254 | ) |  |  |  |  |  |  |  |  |  |  | (398,256 | )
Other comprehensive loss |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (69,352 | ) |  |  | (69,352 | )
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 301,575 |  |  |  | - |  |  |  | 301,575 |
Balance at March 31, 2020 |  |  | 33,118,729 |  |  | $ | 331 |  |  | $ | 89,843,638 |  |  | $ | (52,810,001 | ) |  | $ | (442,757 | ) |  | $ | 36,591,211 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Additional |  |  |  |  |  |  | Other |  |  | Total |
|  | Common Stock |  |  | Paid-in |  |  | Accumulated |  |  | Comprehensive |  |  | Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Loss |  |  | Equity |
Balance at September 30, 2018 |  |  | 33,176,146 |  |  | $ | 332 |  |  | $ | 90,251,145 |  |  | $ | (56,516,895 | ) |  | $ | (245,375 | ) |  | $ | 33,489,207 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 133,845 |  |  |  | - |  |  |  | - |  |  |  | 133,845 |
Issuance of common stock upon exercise of stock options, net |  |  | 1,600 |  |  |  | - |  |  |  | 2,528 |  |  |  | - |  |  |  | - |  |  |  | 2,528 |
Issuance of common stock upon vesting of restricted stock units |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Stock buyback |  |  | (588,425 | ) |  |  | (6 | ) |  |  | (1,621,016 | ) |  |  | - |  |  |  | - |  |  |  | (1,621,022 | )
Other comprehensive loss |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (54,335 | ) |  |  | (54,335 | )
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,045,940 |  |  |  | - |  |  |  | 1,045,940 |
Balance at December 31, 2018 |  |  | 32,589,321 |  |  | $ | 326 |  |  | $ | 88,766,502 |  |  | $ | (55,470,955 | ) |  | $ | (299,710 | ) |  | $ | 32,996,163 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 171,977 |  |  |  | - |  |  |  | - |  |  |  | 171,977 |
Issuance of common stock upon exercise of stock options, net |  |  | 26,682 |  |  |  | - |  |  |  | 42,644 |  |  |  | - |  |  |  | - |  |  |  | 42,644 |
Issuance of common stock upon vesting of restricted stock units |  |  | 156,115 |  |  |  | 2 |  |  |  | (2 | ) |  |  | - |  |  |  | - |  |  |  | - |
Stock buyback |  |  | (200,000 | ) |  |  | (2 | ) |  |  | (549,998 | ) |  |  | - |  |  |  |  |  |  |  | (550,000 | )
Other comprehensive loss |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (69,091 | ) |  |  | (69,091 | )
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,178,850 |  |  |  | - |  |  |  | 1,178,850 |
Balance at March 31, 2019 |  |  | 32,572,118 |  |  | $ | 326 |  |  | $ | 88,431,123 |  |  | $ | (54,292,105 | ) |  | $ | (368,801 | ) |  | $ | 33,770,543 |
Common Stock Activity During the six months ended March 31, 2020, the Company issued 140,204 shares of common stock and obtained gross proceeds of $258,047 in connection with the exercise of stock options. During the six months ended March 31, 2019, the Company issued 28,282 shares of common stock and obtained gross proceeds of $45,172 in connection with the exercise of stock options. During the six months ended March 31, 2020, the Company issued 185,043 shares of commons stock in connection with the vesting of RSUs. During the six months ended March 31, 2019, the Company issued 156,115 shares of commons stock in connection with the vesting of RSUs. Share Buyback Program The Board of Directors approved a share buyback program in 2015 under which the Company was authorized to repurchase up to $4 million of its outstanding common shares. In December 2017, the Board of Directors extended the program through December 31, 2018. In December 2018, the Board of Directors approved a new share buyback program beginning January 1, 2019 and expiring on December 31, 2020, under which the Company was authorized to repurchase up to $5 million of its outstanding common shares. During the six months ended March 31, 2020, the Company repurchased 156,505 shares for $398,256. During the six months ended March 31, 2019, 788,425 shares were repurchased for $2,171,022. All repurchased shares were retired. Dividends There were no dividends declared in the six months ended March 31, 2020 and 2019.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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