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Note 15 - Stockholders' Equity | 6 Months Ended
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Mar. 31, 2019
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | 1 5 . STOCKHOLDERS’ EQUITY Summary The following table summarizes changes in the components of stockholders’ equity during the six months ended March 31, 2019 and the six months ended March 31, 2018:
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 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 |  |  | - |  |  |  | - |  |  |  | 171,975 |  |  |  | - |  |  |  | - |  |  |  | 171,975 |
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 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Additional |  |  |  |  |  |  | Other |  |  | Total |
|  | Common Stock |  |  | Paid-in |  |  | Accumulated |  |  | Comprehensive |  |  | Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Loss |  |  | Equity |
Balance at September 30, 2017 |  |  | 32,158,436 |  |  | $ | 322 |  |  | $ | 87,956,839 |  |  | $ | (52,771,853 | ) |  | $ | (1,269 | ) |  | $ | 35,184,039 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 138,461 |  |  |  | - |  |  |  |  |  |  |  | 138,461 |
Issuance of common stock upon exercise of stock options, net |  |  | 90,852 |  |  |  | - |  |  |  | 159,518 |  |  |  | - |  |  |  | - |  |  |  | 159,518 |
Issuance of common stock upon vesting of restricted stock units |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Stock buyback |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Other comprehensive loss |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (8,031 | ) |  |  | (8,031 | )
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (1,683,252 | ) |  |  | - |  |  |  | (1,683,252 | )
Balance at December 31, 2017 |  |  | 32,249,288 |  |  | $ | 322 |  |  | $ | 88,254,818 |  |  | $ | (54,455,105 | ) |  | $ | (9,300 | ) |  | $ | 33,790,735 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 145,789 |  |  |  | - |  |  |  | - |  |  |  | 145,789 |
Issuance of common stock upon exercise of stock options, net |  |  | 20,000 |  |  |  | - |  |  |  | 26,200 |  |  |  | - |  |  |  | - |  |  |  | 26,200 |
Issuance of common stock upon vesting of restricted stock units |  |  | 125,000 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Stock buyback |  |  | - |  |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |  |  |  | - |
Other comprehensive loss |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (4,482 | ) |  |  | (4,482 | )
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 460,908 |  |  |  | - |  |  |  | 460,908 |
Balance at March 31, 2018 |  |  | 32,394,288 |  |  | $ | 322 |  |  | $ | 88,426,807 |  |  | $ | (53,994,197 | ) |  | $ | (13,782 | ) |  | $ | 34,419,150 |
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 is authorized to repurchase up to $5 million of its outstanding common shares exclusive of any fees, commissions or other expenses related to such repurchases. At March 31, 2019, $4.5 million was available for share repurchase under this program. The previous program expired on December 31, 2018. There were 788,425 shares repurchased for $2,171,022 during the six months ended March 31, 2019. There were no shares repurchased during the six -month period ended March 31, 2018. At March 31, 2019, all repurchased shares were retired into treasury. Dividends There were no dividends declared in the six months ended March 31, 2019 and 2018.

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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://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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