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Note 2 - Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2018
Note 2 - Summary of Significant Accounting Policies (Tables) [Line Items] |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | A reconciliation of the January 1, 2018 through September 30, 2018, amount of unrecognized tax benefits excluding interest and penalties (“Gross UTB”) is as follows:
|  | Gross UTB |
Beginning Balance – January 1, 2018 |  | $ | 1,428,561 |
Decrease in unrecorded tax benefits taken in the nine months ended September 30, 2018 |  |  | (726,208 | )
Ending Balance – September 30, 2018 |  | $ | 702,353 |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] | Amounts determined to be uncollectible are charged or written-off against the reserve. An analysis of the allowance for doubtful accounts is as follows:
Balance at January 1, 2018 |  | $ | 218,976 |
Provision for the period |  |  | 2,298,488 |
Balance at September 30, 2018 |  | $ | 2,517,464 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents a reconciliation of basic and diluted earnings (loss) per share for the nine and three months ended September 30, 2018 and 2017:
|  | Nine Months Ended September 30, |  |  | Three Months Ended September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Net Income (Loss) |  | $ | 2,526,293 |  |  | $ | 2,304,709 |  |  | $ | (492,033 | ) |  | $ | 2,956,633 |
Weighted average shares outstanding – basic* |  |  | 28,349,945 |  |  |  | 27,570,425 |  |  |  | 28,439,977 |  |  |  | 27,846,921 |
Dilutive stock options and unvested restricted stock |  |  | 309,710 |  |  |  | 133,981 |  |  |  | - |  |  |  | 133,708 |
Weighted average shares outstanding – diluted |  |  | 28,659,655 |  |  |  | 27,704,406 |  |  |  | 28,439,977 |  |  |  | 27,980,629 |
Net income (loss) per share of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.09 |  |  | $ | 0.08 |  |  | $ | (0.02 | ) |  | $ | 0.11 |
Diluted |  | $ | 0.09 |  |  | $ | 0.08 |  |  | $ | (0.02 | ) |  | $ | 0.11 |
* Including 836,534 and 571,533 shares that were granted and vested but not yet issued for the nine months ended September 30, 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 10% salvage value and estimated lives as follows:
Computer and office equipment | 5 years
Decoration and renovation | 10 years

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