XML 59 R49.htm IDEA: XBRL DOCUMENT v3.19.1

Note 11 - Business Segment Information - Revenue by Business Segment Sector (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Apr. 01, 2018
Revenue	[1]	$ 18,882	$ 23,069
Revenue, percentage	[1]
Commercial [Member]
Revenue		$ 10,010	$ 9,626
Revenue, percentage		53.00%	42.00%
Government & Defense [Member]
Revenue		$ 8,872	$ 13,443
Revenue, percentage		47.00%	58.00%
Battery & Energy Products Segment [Member]
Revenue	[1]	$ 15,998	$ 17,224
Battery & Energy Products Segment [Member] | Commercial [Member]
Revenue		10,010	9,626
Battery & Energy Products Segment [Member] | Government & Defense [Member]
Revenue		5,988	7,598
Communications Systems Segment [Member]
Revenue	[1]	2,884	5,845
Communications Systems Segment [Member] | Commercial [Member]
Revenue
Communications Systems Segment [Member] | Government & Defense [Member]
Revenue		$ 2,884	$ 5,845
[1] Sales classified to U.S. include shipments to U.S.-based prime contractors which in some cases may serve non-U.S. projects

X

- Definition

The percentage of total revenue for the period.

+ References

No definition available.

+ Details

Name:	ulbi_RevenueTotalPercentage
Namespace Prefix:	ulbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	srt_MajorCustomersAxis=ulbi_CommercialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=ulbi_GovernmentDefenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ulbi_BatteryEnergyProductsSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ulbi_CommunicationsSystemsSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: