Note 11 - Related Party Transactions (Details Textual) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
May 31, 2017 |
|
| Statement Line Items [Line Items] | |||
| Services to be received, related party transactions, maximum | $ 300,000 | ||
| Services received, related party transactions | $ 143,000 | $ 122,000 | |
| X | ||||||||||
- Definition The maximum amount of services that can be received in a related party transaction. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of services received in related party transactions. [Refer: Related parties [member]] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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