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Note 2 - Summary of Significant Accounting Policies (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 22, 2017 | Dec. 21, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Provision for Doubtful Accounts |  |  | $ 13,241 | $ 305,519
Asset Impairment Charges |  |  | $ (237,290) | $ (373,935)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 35.00% | 21.00% | 35.00%
Effective Income Tax Rate Reconciliation Tax Cut and Jobs Act |  |  | $ 30,055 | $ 3,365,221
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount |  |  |  | 3,270,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  |  | 324,000 | 90,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued |  |  | 619,000 | 599,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense |  |  | $ 19,000 | $ 38,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares) |  |  | 814,034 | 777,518
Number of Operating Segments |  |  | 1 |
Diamond Bar [Member] |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Goodwill, Impairment Loss |  |  | $ 0 | $ 0
Customer Concentration Risk [Member] |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Accounts Receivable, Gross, Current |  |  | $ 55,683,031 | $ 42,882,694
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Concentration Risk, Percentage |  |  | 38.00% | 50.00%
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 |  |  | 13.00% | 24.00%
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 |  |  | 13.00% | 14.00%
Customer Concentration Risk [Member] | Major Custom C [Member] | Sales Revenue, Net [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] |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Concentration Risk, Percentage |  |  | 82.00% | 64.00%
Accounts Receivable, Gross |  |  | $ 7,722,158 | $ 8,236,941
Accounts Payable |  |  |  | $ 345,114
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 |  |  | 37.00% | 24.00%
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 |  |  | 34.00% | 17.00%
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% | 13.00%
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 |  |  |  | 10.00%
Continuing Operations [Member] |  |  |  |
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Provision for Doubtful Accounts |  |  | $ 13,241 | $ 305,519
Cost of Goods and Services Sold |  |  | 6,399 | 3,319
Advertising Expense |  |  | $ 1,076,570 | $ 1,321,606
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
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) |  |  | 130,000 |

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