WORKING CAPITAL LINE OF CREDIT AND OVERDRAFT FACILITY - Security Agreement (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
General intangibles, net	$ 16,201	$ 18,746
Inventory, net	13,202	12,321	[1]
Equipment, net	10,952	$ 11,950
CUI, Inc [Member]
Line of Credit Facility [Line Items]
General intangibles, net	9,213
Accounts receivable, Net	5,350
Inventory, net	6,984
Equipment, net	$ 851

[1] At December 31, 2015, CUI-Canada inventory reserves of $97 thousand were reclassified from raw materials to inventory reserves and $246 thousand of prepaid expenses at CUI Inc. were reclassified to raw materials inventory.