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Note 2 - Summary of Significant Accounting Policies (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Salvage Value, Percentage 10.00%    
Research and Development Expense $ 65,589 $ 0  
Income Tax Expense (Benefit) $ 247,257 (170,019)  
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 $ 1,428,561   2,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 631,000,000   599,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense 32,000,000 33,000  
Deferred Tax Liabilities, Other     $ 2,500,000
Provision for Doubtful Accounts $ 321,970    
Provision for Doubtful Accounts, Reversal   $ 324,684  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares) 821,534 466,967  
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 $ 37,674,823 $ 8,835,931  
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]      
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 43.00% 26.00%  
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 27.00% 13.00%  
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 16.00% 14.00%  
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member]      
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 93.00% 89.00%  
Accounts Receivable, Gross $ 10,401,410 $ 20,981,900  
Accounts Payable $ 345,144 $ 186,772  
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% 33.00%  
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 32.00% 25.00%  
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 22.00% 18.00%  
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   13.00%  
Continuing Operations [Member]      
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]      
Unrecognized Tax Benefits $ 2.1    
Advertising Expense $ 192,579 $ 537,579  
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    
Shipping and/or Handling [Member]      
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]      
Cost of Goods and Services Sold $ 184 $ 305