Note 10 - Related Party Transactions  | 
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2017  | ||||
| Notes to Financial Statements | ||||
| Related Party Transactions Disclosure [Text Block] | 
 The Company entered into consulting and legal arrangements with certain stockholders related to services performed for the operations and transaction related activities of the Company.  Amounts paid to or for the benefit of these stockholders was approximately  
$205,000  and $461,000  for the years ended  December 31, 2017  and 2016,  respectively. | 
| X | ||||||||||
- References No definition available. 
  | 
| X | ||||||||||
- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |