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Note 2 - Summary of Significant Accounting Policies (Tables)
9 Months Ended
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