Note 16 - Working Capital Line of Credit and Overdraft Facility - Security Agreement (Details) - CUI, Inc [Member] $ in Thousands	Jun. 30, 2018 USD ($)
General Intangibles [Member]
Collateral, amount	$ 8,756
Accounts Receivable [Member]
Collateral, amount	9,741
Inventory [Member]
Collateral, amount	9,771
Equipment [Member]
Collateral, amount	$ 1,691

Amount of assets pledged to secure a debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Name:	us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant