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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Note 2 - Summary of Significant Accounting Policies (Tables) [Line Items] |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] | An analysis of the allowance for doubtful accounts is as follows:
Balance at January 1, 2018 |  | $ | 218,976 |
Provision for the year |  |  | 13,241 |
Write off |  |  | (7,422 | )
Balance at December 31, 2018 |  | $ | 224,795 |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | A reconciliation of the January 1, 2017 through December 31, 2018, amount of unrecognized tax benefits excluding interest and penalties (“Gross UTB”) is as follows:
|  | Gross UTB |
|  | 2018 |  |  | 2017 |
Beginning Balance – January 1 |  | $ | 1,428,561 |  |  |  | 1,642,381 |
Decrease in unrecorded tax benefits taken |  |  | (706,507 | ) |  |  | (213,820 | )
Ending Balance – December 31 |  | $ | 722,054 |  |  |  | 1,428,561 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents a reconciliation of basic and diluted earnings per share for the years ended December 31, 2018 and 2017:
|  | Years Ended December 31, |
|  | 2018 |  |  | 2017 |
Net Income |  | $ | 5,299,625 |  |  | $ | 3,764,611 |
Weighted average shares outstanding – basic* |  |  | 28,393,854 |  |  |  | 27,677,935 |
Dilutive stock options and unvested restricted stock |  |  | 219,430 |  |  |  | 77,928 |
Weighted average shares outstanding – diluted |  |  | 28,613,284 |  |  |  | 27,755,863 |
Net income per share of common stock |  |  |  |  |  |  |  |
Basic |  | $ | 0.19 |  |  | $ | 0.14 |
Diluted |  | $ | 0.19 |  |  | $ | 0.14 |
* Including 814,034 and 777,518 shares that were granted and vested but not yet issued for the years ended December 31, 2018 and 2017, respectively.
Property Plant and Equipment Estimated Useful Lives [Member] |
Note 2 - Summary of Significant Accounting Policies (Tables) [Line Items] |
Property, Plant and Equipment [Table Text Block] | Depreciation of property and equipment is provided using the straight-line method for substantially all assets with no salvage value and estimated lives as follows:
Computer and office equipment | 5 years
Decoration and renovation | 10 years

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