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Note 8 - Federal, State and Local Income Taxes - Schedule of Components of Deferred Tax Asset and Deferred Tax Liability (Details) - USD ($) $ in Thousands | Oct. 31, 2016 | Apr. 30, 2016
--- | --- | ---
Domestic Tax Authority [Member] |  |
Unrealized gains on securities available-for-sale | $ 8 | $ (68)
Capital loss carryforward |  | 86
Operating lease deferred obligation | 23 | 58
Deferred professional fees | 17 | 77
Deferred charges | 162 | 250
Total federal tax benefit | 210 | 403
Deferred gain on deconsolidation of EAM | 17,732 | 17,679
Deferred non-cash post-employment compensation | (619) | (619)
Depreciation and amortization | 1,018 | 1,812
Other | (77) | 8
Total federal tax liability | 18,054 | 18,880
Other | (77) | 8
Deferred tax liability, long term | 18,054 | 18,880
State and Local Jurisdiction [Member] |  |
Total federal tax benefit | 22 | 29
Other | 22 | 29
Deferred gain on deconsolidation of EAM | 1,434 | 1,704
Deferred non-cash post-employment compensation | (50) | (60)
Depreciation and amortization | 82 | 174
Other | (1) | (15)
Total federal tax liability | 1,465 | 1,803
Other | (1) | (15)
Deferred tax liability, long term | 1,465 | 1,803
Total federal tax benefit | 232 | 432
Total federal tax liability | 19,519 | 20,683
Deferred tax liability, long term | $ 19,519 | $ 20,683

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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 + Details
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