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Note 16 - Restructuring (Tables) | 9 Months Ended
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Dec. 31, 2019
Notes Tables |
Restructuring and Related Costs [Table Text Block] |
|  | Severance pay |  |  | Facility exit and |  |  |  |  |
|  | and benefits |  |  | Relocation costs |  |  | Total |
Accrued restructuring balance at April 1, 2018 |  | $ | 262 |  |  | $ | 173 |  |  | $ | 435 |
Charges to operations |  |  | — |  |  |  | 450 |  |  |  | 450 |
Cash payments |  |  | (262 | ) |  |  | (623 | ) |  |  | (885 | )
Accrued restructuring balance at December 31, 2018 |  | $ | — |  |  | $ | — |  |  | $ | — |

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