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Note 3 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) xbrli-pure in Thousands | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019 | Jan. 01, 2017 | Dec. 31, 2016
Impairment of Long-Lived Assets to be Disposed of |  |  |  | $ 0 | $ 0 |  |  |
Impairment of Intangible Assets (Excluding Goodwill), Total |  |  |  | 0 | 0 |  |  |
Goodwill, Impairment Loss |  | $ 2,700,000 | $ 4,200,000 | $ 6,929,258 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  |  | 0.00% |  |  |  |
Assets, Total |  | 18,201,992 |  | $ 18,201,992 | $ 26,145,815 |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | [1] |  |  |  |  |  |  |
Liabilities, Total |  | $ 2,590,433 |  | $ 2,590,433 | 4,915,871 |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | [1] |  |  |  |  |  |  | $ 1,134
Accounting Standards Update 2016-09 [Member] | Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  |  |  | $ 1,000 |
Accounting Standards Update 2016-09 [Member] | AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  |  |  | $ (1,000) |
Minimum [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  | 2 years |  |  |  |
Minimum [Member] | Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Assets, Total |  |  |  |  |  | $ 300,000 |  |
Liabilities, Total |  |  |  |  |  | 300,000 |  |
Maximum [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  | 15 years |  |  |  |
Maximum [Member] | Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Assets, Total |  |  |  |  |  | 400,000 |  |
Liabilities, Total |  |  |  |  |  | $ 400,000 |  |
Fair Value, Inputs, Level 3 [Member] | Convertible Note, Series B [Member] |  |  |  |  |  |  |  |
Convertible Debt, Fair Value Disclosures |  |  |  |  | $ 600,000 |  |  |
[1] | In 2017, the Company adopted provisions of ASU 2016-09, Improvements to Employee Share Based Payment Accounting, resulting in a cumulative effect adjustment to Accumulated Deficit and Additional Paid-in Capital for previously unrecognized stock-based compensation expense.

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