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Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Operating lease impairment adjustment upon the adoption of ASU 2016-02 "Leases", tax | $ 14,427 | $ (12,776)
Discontinued Operation, Tax Effect of Discontinued Operation, Total | $ 400 | $ 13,500
Effective Income Tax Rate Reconciliation, Percent, Total | 22.00% | 25.90%
Effective Income Tax Rate Continuing Operations Change | (3.90%) |
Effective Income Tax Rate Reconciliation, Tax Law Change, Percent | (2.80%) |
Effective Income Tax Rate Reconciliation, Creation of Federal Tax Credits, Percentage | (1.80%) |
Effective Income Tax Rate Reconciliation, Alternative Fuel Tax Credit, Amount | $ 130 |
Effective Income Tax Rate Reconciliation, CARES Act, Amount | 1,700 |
Deferred Income Tax Assets, Net, Total | 7,872 | $ 2,417
Tax Credit Carryforward, Valuation Allowance | 4,500 |
Unrecognized Tax Benefits, Uncertainty on Timing | 1,600 | 0
Unrecognized Tax Benefits, Period Increase (Decrease), Total | 200 | 100
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | 200 | $ 0
Effective Income Tax Rate Reconciliation, Lapses of Applicable Statute of Limitations, Amount | 0 |
California Franchise Tax Board [Member] |  |
Tax Credit Carryforward, Amount | 1,500 |
New York State Division of Taxation and Finance [Member] |  |
Tax Credit Carryforward, Amount | 1,900 |
Wisconsin Department of Revenue [Member] |  |
Tax Credit Carryforward, Amount | $ 2,200 |

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