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Note 10 - Revenue (Details Textual) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 05, 2018 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 | Dec. 31, 2017 USD ($) | Jan. 01, 2018 USD ($)
Contract with Customer, Liability, Total |  |  | $ 150,983,318 |  | $ 160,581,528 | $ 160,600,000
Contract with Customer, Liability, Revenue Recognized | [1] |  | $ (69,968,261) |  |  |
Namecheap, Inc. [Member] |  |  |  |  |  |
Domain Name Transfer to Counter Party |  | 2,650,000 |  |  |  |
Contract with Customer, Liability, Revenue Recognized |  | $ 14,600,000 |  |  |  |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |  |  |  |
Number of Customers |  |  | 1 | 0 |  |
Concentration Risk, Percentage |  |  | 18.00% |  |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |  |  |  |
Number of Customers |  |  | 0 |  | 0 |
[1] | As a result of the bulk transfer of 2.65 million domain names to Namecheap on January 5th, 2018, the Company recognized deferred revenue includes $14.6 million related to previously deferred revenue.

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