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Note 16 - Stockholders' Equity | 9 Months Ended
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Jun. 30, 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 nine months ended June 30, 2020 and the three and nine months ended June 30, 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 |
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 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 322,025 |  |  |  | - |  |  |  | - |  |  |  | 322,025 |
Issuance of common stock upon exercise of stock options, net |  |  | 371,815 |  |  |  | 4 |  |  |  | 738,840 |  |  |  | - |  |  |  | - |  |  |  | 738,844 |
Other comprehensive income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 51,274 |  |  |  | 51,274 |
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,504,077 |  |  |  | - |  |  |  | 1,504,077 |
Balance at June 30, 2020 |  |  | 33,490,544 |  |  | $ | 335 |  |  | $ | 90,904,503 |  |  | $ | (51,305,924 | ) |  | $ | (391,483 | ) |  | $ | 39,207,431 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 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 |
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 |
Share-based compensation expense |  |  | - |  |  |  | - |  |  |  | 257,566 |  |  |  | - |  |  |  | - |  |  |  | 257,566 |
Issuance of common stock upon exercise of stock options, net |  |  | 7,000 |  |  |  | - |  |  |  | 9,449 |  |  |  | - |  |  |  | - |  |  |  | 9,449 |
Other comprehensive loss |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 56,538 |  |  |  | 56,538 |
Net income |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 638,041 |  |  |  | - |  |  |  | 638,041 |
Balance at June 30, 2019 |  |  | 32,579,118 |  |  | $ | 326 |  |  | $ | 88,698,138 |  |  | $ | (53,654,064 | ) |  | $ | (312,263 | ) |  | $ | 34,732,137 |
Common Stock Activity During the nine months ended June 30, 2020, the Company issued 512,019 shares of common stock and obtained gross proceeds of $996,891 in connection with the exercise of stock options. During the nine months ended June 30, 2019, the Company issued 35,282 shares of common stock and obtained gross proceeds of $54,621 in connection with the exercise of stock options. During the nine months ended June 30, 2020, the Company issued 185,043 shares of common stock in connection with the vesting of RSUs. During the nine months ended June 30, 2019, the Company issued 156,115 shares of common 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 nine months ended June 30, 2020, the Company repurchased 156,505 shares for $398,256. During the nine months ended June 30, 2019, 788,425 shares were repurchased for $2,171,022. All repurchased shares were retired. Dividends There were no dividends declared in the nine months ended June 30, 2020 and 2019.

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