Note 14 - Related Party Transactions (Details Textual) - USD ($) |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
May 31, 2017 |
Dec. 31, 2015 |
Mar. 31, 2015 |
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| Statement Line Items [Line Items] | |||||
| Services to be received, related party transactions, maximum | $ 300,000 | $ 200,000 | |||
| Services received, related party transactions | $ 240,000 | $ 168,000 | |||
| Amounts payable, related party transactions | $ 484,000 | $ 261,000 | $ 9,000 | ||
| X | ||||||||||
- Definition The maximum amount of services that can be received in a related party transaction. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amounts payable resulting from related party transactions. [Refer: Related parties [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| 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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