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Income Taxes (Tables) | 12 Months Ended
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Apr. 30, 2020
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] | The Loss before (benefit) provision for income taxes consisted of (in thousands):
|  | Year Ended April 30, |
|  | 2020 |  |  | 2019 |
U.S. |  | $ | (11,768 | ) |  | $ | (4,713 | )
Foreign |  |  | - |  |  |  | 2,240 |
|  | $ | (11,768 | ) |  | $ | (2,473 | )
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] | The (benefit) provision for income taxes consisted of the following (in thousands):
|  | Year Ended April 30, |
|  | 2020 |  |  | 2019 |
Current: |  |  |  |  |  |  |  |
Federal |  | $ | (1,713 | ) |  | $ | 8 |
Foreign |  |  | - |  |  |  | 196 |
State |  |  | (37 | ) |  |  | 99 |
Current (benefit) provision |  |  | (1,750 | ) |  |  | 303 |
Deferred: |  |  |  |  |  |  |  |
Federal |  |  | 9 |  |  |  | - |
Foreign |  |  | - |  |  |  | (247 | )
State |  |  | (1 | ) |  |  | - |
Deferred tax (benefit) |  |  | 8 |  |  |  | (247 | )
Total (benefit) provision |  | $ | (1,742 | ) |  | $ | 56 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | The following table reconciles the reported income tax (benefit) expense, recorded primarily due to the (i) enactment of the CARES Act, which allowed the Company to recognize a tax benefit for a portion of its pretax loss, (ii) state and local taxes, (iii) and a change in the valuation allowance, with the amount computed using the federal statutory income tax rate (in thousands):
|  | Year Ended April 30, |
|  | 2020 |  |  | 2019 |
Statutory rate |  | $ | (2,471 | ) |  | $ | (519 | )
State and local tax |  |  | (417 | ) |  |  | (32 | )
Valuation allowance on deferred tax assets |  |  | 2,009 |  |  |  | 1,419 |
Effect of foreign operations |  |  | - |  |  |  | (51 | )
Nondeductible expenses |  |  | (134 | ) |  |  | 87 |
Sale of Subsidiary Stock |  |  | - |  |  |  | (863 | )
Uncertain tax positions |  |  | - |  |  |  | 101 |
Nontaxable life insurance cash value increase |  |  | (73 | ) |  |  | (120 | )
Tax credits |  |  | (46 | ) |  |  | (28 | )
Change in tax rate |  |  | (120 | ) |  |  | 225 |
Impact of CARES Act |  |  | (592 | ) |  |  | - |
Other items |  |  | 102 |  |  |  | (163 | )
Total (benefit) expense |  | $ | (1,742 | ) |  | $ | 56 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | The components of deferred taxes are as follows (in thousands):
|  | Year Ended April 30, |
|  | 2020 |  |  | 2019 |
Deferred tax assets: |  |  |  |  |  |  |  |
Employee benefits |  | $ | 4,794 |  |  | $ | 5,092 |
Inventory |  |  | 1,904 |  |  |  | 1,649 |
Accounts receivable |  |  | 207 |  |  |  | 204 |
Tax credits |  |  | 1,610 |  |  |  | 1,300 |
Other assets |  |  | 1,073 |  |  |  | 148 |
Lease Liability |  |  | 2,807 |  |  |  | - |
Capital Loss carry-forward |  |  | 2,515 |  |  |  | 2,455 |
Net operating loss carryforwards |  |  | 6,185 |  |  |  | 5,556 |
Total deferred tax asset |  |  | 21,095 |  |  |  | 16,404 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | (1,518 | ) |  |  | (1,344 | )
Right of use asset |  |  | (2,696 | ) |  |  |  |
Other liabilities |  |  | (193 | ) |  |  | (343 | )
Deferred state income tax |  |  | (842 | ) |  |  | (767 | )
Net deferred tax asset |  |  | 15,846 |  |  |  | 13,950 |
Valuation allowance |  |  | (15,854 | ) |  |  | (13,950 | )
Net deferred tax (liability) asset |  | $ | (8 | ) |  | $ | - |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | A reconciliation of the beginning and ending amounts of unrecognized tax benefits, is as follows (in thousands):
|  | 2020 |  |  | 2019 |
Balance at the beginning of the fiscal year |  | $ | 1,258 |  |  | $ | 1,264 |
Additions based on positions taken in the fiscal year ended April 30, 2020 |  |  | 15 |  |  |  | - |
Additions based on positions taken in prior years |  |  | 119 |  |  |  | 142 |
Decreases based on positions taken in prior years |  |  | (2 | ) |  |  | (119 | )
Lapse in statute of limitations |  |  | (36 | ) |  |  | (29 | )
Balance at the end of the fiscal year |  | $ | 1,354 |  |  | $ | 1,258 |

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