Note 11 - Income Taxes - Deferred Income Taxes (Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Inventories	$ 1,214	$ 1,753
Employee benefits (other than pension)	700	807
Book reserves	504	725
Federal NOL, various carryforward periods	551	154
State NOL, various carryforward periods	1,034	786
Foreign NOL, various carryforward periods	148	452
Foreign tax credit carryforward, expiring 2018 – 2027	5,563	4,222
Pension benefits	8,881	16,074
Retiree medical benefits	1,622	2,679
Depreciation	113	134
Intangibles	(410)	(269)
Federal research and development and AMT credit carryforward	638	545
Other	1,180	892
Total deferred tax assets	21,738	28,954
Valuation allowance	(4,999)	(2,922)
Net deferred tax asset	$ 16,739	$ 26,032

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards, classified as noncurrent.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e31917-109318

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e31931-109318