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Note 12 - Segment Information (Tables) | 6 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Six Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Total revenues (a) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sterilization and Disinfection Control |  | $ | 14,033 |  |  | $ | 11,552 |  |  | $ | 29,183 |  |  | $ | 24,619 |
Biopharmaceutical Development |  |  | 10,555 |  |  |  | 9,131 |  |  |  | 19,432 |  |  |  | 15,080 |
Instruments |  |  | 6,970 |  |  |  | 7,558 |  |  |  | 14,532 |  |  |  | 15,238 |
Continuous Monitoring |  |  | 4,282 |  |  |  | 3,619 |  |  |  | 7,613 |  |  |  | 6,864 |
Total revenues (a) |  | $ | 35,840 |  |  | $ | 31,860 |  |  | $ | 70,760 |  |  | $ | 61,801 |
Gross profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sterilization and Disinfection Control |  | $ | 10,486 |  |  | $ | 8,770 |  |  | $ | 21,914 |  |  | $ | 18,790 |
Biopharmaceutical Development |  |  | 6,601 |  |  |  | 6,212 |  |  |  | 11,293 |  |  |  | 10,678 |
Instruments |  |  | 4,112 |  |  |  | 4,852 |  |  |  | 8,772 |  |  |  | 9,541 |
Continuous Monitoring |  |  | 2,016 |  |  |  | 1,368 |  |  |  | 3,468 |  |  |  | 2,552 |
Reportable segment gross profit |  |  | 23,215 |  |  |  | 21,202 |  |  |  | 45,447 |  |  |  | 41,561 |
Corporate and Other (b) |  |  | (75 | ) |  |  | 83 |  |  |  | (96 | ) |  |  | 64 |
Gross profit |  | $ | 23,140 |  |  | $ | 21,285 |  |  | $ | 45,351 |  |  | $ | 41,625 |
Reconciling Items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating expenses |  |  | 18,939 |  |  |  | 16,815 |  |  |  | 38,027 |  |  |  | 33,585 |
Operating income |  |  | 4,201 |  |  |  | 4,470 |  |  |  | 7,324 |  |  |  | 8,040 |
Nonoperating (income) expense, net |  |  | (342 | ) |  |  | 2,086 |  |  |  | 1,363 |  |  |  | 4,902 |
Earnings before income taxes |  | $ | 4,543 |  |  | $ | 2,384 |  |  | $ | 5,961 |  |  | $ | 3,138 |
Reconciliation of Assets from Segment to Consolidated [Table Text Block] |
|  | September 30, |  |  | March 31, |
|  | 2021 |  |  | 2021 |
Sterilization and Disinfection Control |  | $ | 2,187 |  |  | $ | 2,333 |
Biopharmaceutical Development |  |  | 3,706 |  |  |  | 4,162 |
Instruments |  |  | 4,566 |  |  |  | 3,253 |
Continuous Monitoring |  |  | 1,658 |  |  |  | 1,430 |
Total inventories |  | $ | 12,117 |  |  | $ | 11,178 |

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