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Note 14 - Income Taxes (Tables) | 12 Months Ended
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Mar. 31, 2021
Notes Tables |
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | Year Ended March 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Domestic |  | $ | 6,297 |  |  | $ | 16,059 |  |  | $ | 12,133 |
Foreign |  |  | (3,994 | ) |  |  | (12,197 | ) |  |  | (3,510 | )
Total earnings before income taxes |  | $ | 2,303 |  |  | $ | 3,862 |  |  | $ | 8,623 |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | Year Ended March 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Current tax provision |  |  |  |  |  |  |  |  |  |  |  |
U.S. Federal |  | $ | 1,500 |  |  | $ | 2,348 |  |  | $ | 1,831 |
U.S. State |  |  | 628 |  |  |  | 814 |  |  |  | 449 |
Foreign |  |  | 404 |  |  |  | 993 |  |  |  | 1,166 |
Total current tax expense |  |  | 2,532 |  |  |  | 4,155 |  |  |  | 3,446 |
Deferred tax provision: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Federal |  |  | (2,410 | ) |  |  | 60 |  |  |  | (741 | )
U.S. State |  |  | (619 | ) |  |  | 599 |  |  |  | (106 | )
Foreign |  |  | (474 | ) |  |  | (2,730 | ) |  |  | (1,460 | )
Total deferred tax benefit |  |  | (3,503 | ) |  |  | (2,071 | ) |  |  | (2,307 | )
Total income tax (benefit) expense |  | $ | (971 | ) |  | $ | 2,084 |  |  | $ | 1,139 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | March 31, 2021 |  |  | March 31, 2020 |
Deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss |  | $ | 8,990 |  |  |  | 8,874 |
Stock compensation deductible differences |  |  | 2,099 |  |  |  | 1,265 |
Inventories |  |  | 838 |  |  |  | 504 |
Allowances and reserves |  |  | 1,471 |  |  |  | 105 |
Accrued employee-related expenses |  |  | 209 |  |  | $ | 208 |
Credits |  |  | 169 |  |  |  | 47 |
Other |  |  | 25 |  |  |  | 458 |
Total deferred tax assets |  |  | 13,801 |  |  |  | 11,461 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Goodwill and intangible assets |  |  | (23,029 | ) |  |  | (24,825 | )
Debt |  |  | (4,723 | ) |  |  | (5,982 | )
Property, plant and equipment |  |  | (1,275 | ) |  |  | (1,286 | )
Other |  |  | (29 | ) |  |  | (65 | )
Total deferred tax liabilities |  |  | (29,056 | ) |  |  | (32,158 | )
Valuation allowance |  |  | (404 | ) |  |  | (391 | )
Net deferred tax liability |  | $ | (15,659 | ) |  | $ | (21,088 | )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | Year Ended March 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Federal income taxes at statutory rates |  | $ | 483 |  |  | $ | 811 |  |  | $ | 1,811 |
State income taxes, net of federal benefit |  |  | (221 | ) |  |  | 1,122 |  |  |  | 208 |
Tax benefit of stock option exercises |  |  | (1,816 | ) |  |  | (1,576 | ) |  |  | (2,034 | )
Foreign-derived intangible income deduction |  |  | (999 | ) |  |  | - |  |  |  | - |
Research and development credit |  |  | (165 | ) |  |  | (191 | ) |  |  | (158 | )
Limitation for 162(m) |  |  | 1,113 |  |  |  | 1,112 |  |  |  | 766 |
Foreign rate differential |  |  | 810 |  |  |  | 657 |  |  |  | - |
Other |  |  | (176 | ) |  |  | 149 |  |  |  | 546 |
Total income tax (benefit) expense |  | $ | (971 | ) |  | $ | 2,084 |  |  | $ | 1,139 |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | Year Ended March 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Beginning balance |  | $ | 653 |  |  | $ | 1,361 |  |  | $ | 827 |
Decreases related to prior period tax positions |  |  | (629 | ) |  |  | (1,027 | ) |  |  | - |
Increases related to current period tax positions |  |  | 40 |  |  |  | 319 |  |  |  | 534 |
Ending balance |  | $ | 64 |  |  | $ | 653 |  |  | $ | 1,361 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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