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Note 2 - Summary of Significant Accounting Policies (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Property, Plant and Equipment, Salvage Value, Percentage | 10.00% |  | 10.00% |  |
Research and Development Expense | $ 7,985 | $ 0 | $ 86,790 | $ 364,105 |
Effective Income Tax Rate Reconciliation, Percent |  |  | 24.99% |  |
Income Tax Expense (Benefit) | (942,267) | (262,034) | $ (505,074) | (750,037) |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% |  | 35.00%
Effective Income Tax Rate Reconciliation Tax Cut and Jobs Act |  |  |  |  | $ 3,370,000
Income Tax (Expense) Benefit, Continuing Operations, Estimated One-time Transition Tax on Post-1986 Foreign Unremitting Earnings |  |  |  |  | 3,270,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  |  |  | 90,000
Unrecognized Tax Benefits | 702,353 |  | $ 702,353 |  | 1,428,561
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 594,000,000 |  | 594,000,000 |  | 599,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | (67,949) | 7,000 | (4,949) | 73,000 |
Deferred Tax Liabilities, Other | 2,300,000 |  | 2,300,000 |  | 2,500,000
Provision for Doubtful Accounts |  | (300,419) | 2,298,488 | 203,905 |
Provision for Doubtful Accounts, Reversal | (2,128,579) |  |  | (203,905) |
Revenues | 16,747,827 | 33,222,625 | $ 63,159,929 | $ 70,813,414 |
Advertising Expense | $ 9,754 | $ 186,381 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares) | 836,534 | 571,533 | 836,534 | 571,533 |
Number of Operating Segments |  |  | 1 |  |
Customer Concentration Risk [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Accounts Receivable, Gross, Current | $ 44,212,605 | $ 21,812,355 | $ 44,212,605 | $ 21,812,355 |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 54.00% |  | 36.00% |  |
Customer Concentration Risk [Member] | Major Custom A [Member] | Sales Revenue, Net [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 18.00% |  |
Customer Concentration Risk [Member] | Major Customer B [Member] | Sales Revenue, Net [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 18.00% |  |
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 74.00% | 59.00% | 84.00% | 82.00% |
Accounts Receivable, Gross | $ 18,651,339 | $ 13,237,351 | $ 18,651,339 | $ 13,237,351 |
Accounts Payable | $ 3,043,782 | $ 0 | $ 3,043,782 | $ 0 |
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | Major Vendor A [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 39.00% | 20.00% | 33.00% | 26.00% |
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | Major Vendor B [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 24.00% | 15.00% | 30.00% | 19.00% |
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | Major Vendor C [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 11.00% | 12.00% | 21.00% | 15.00% |
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | Major Vendor D [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  | 12.00% |  | 12.00% |
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | Major Vendor E [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 10.00% |
Continuing Operations [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Income Tax Expense (Benefit) | $ 942,000 |  | $ 505,000 |  |
Unrecognized Tax Benefits | $ 1,300,000 |  | 1,300,000 |  | $ 2,000,000
Advertising Expense |  |  | $ 554,070 | $ 847,177 |
Warrant [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 858,334 | 858,334 | 858,334 | 858,334 |
Restricted Stock [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 35,000 |  |  |  |
Shipping and/or Handling [Member] |  |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Revenues | $ 347 |  | $ 6,624 |  |
Cost of Goods and Services Sold |  | $ 623 |  | $ 1,576 |

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