Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Effect of Exchange Rate on Cash and Cash Equivalents	$ (563)	$ (485)	$ (563)
Restatement Adjustment [Member]
Effect of Exchange Rate on Cash and Cash Equivalents	$ (5,811)

Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 230
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906

Name:	us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration