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Note 8 - Operating Leases (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Lease, Cost [Table Text Block]

		Year ended December 31,
		2024				2023
Operating lease cost		$	1,101			$	1,016
Variable lease cost			100				114
Total lease cost		$	1,201			$	1,130

Lessee, Lease, Cash Flow Information [Table Text Block]

		Year ended December 31,
		2024				2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		$	1,108			$	1,036
Right-of-use assets obtained in exchange for lease liabilities:		$	1,706			$	2,192

Lessee, Lease, Balance Sheet Information [Table Text Block]

			December 31,
	Balance Sheet Classification		2024				2023
Assets:
Operating lease right-of-use asset	Other noncurrent assets		$	4,153			$	3,589
Liabilities:
Current operating lease liability	Accrued expenses and other current liabilities		$	1,138			$	894
Operating lease liability, net of current portion	Other noncurrent liabilities			2,998				2,644
Total operating lease liability			$	4,136			$	3,538
Weighted-average remaining lease term (years)				4.5				5.3
Weighted-average discount rate				6.7	%			4.5	%

Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

Maturity of Operating Lease Liabilities
2025		$	1,178
2026			1,035
2027			981
2028			965
2029			507
Thereafter			107
Total lease payments		$	4,773
Less: Imputed interest			(637	)
Present value of remaining lease payments		$	4,136

X

- Definition

Tabular disclosure of balance sheet information related lessee's lease .

+ References

No definition available.

+ Details

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Namespace Prefix:	ulbi_
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X

- Definition

Tabular disclosure of cash flow information related lessee's lease .

+ References

No definition available.

+ Details

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Namespace Prefix:	ulbi_
Data Type:	dtr-types:textBlockItemType
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X

- Definition

Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

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X

- Definition

Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-6

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- References

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration