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Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Revenues | [1] | $ 34,172 | $ 31,655 | $ 95,973 | $ 83,479
Consumables [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 15,382 | 12,912 | 43,129 | 37,241
Hardware and Software [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 12,052 | 12,109 | 33,033 | 28,656
Service [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 3,780 | 4,217 | 11,548 | 10,815
Service [Member] | Transferred over Time [Member] |  |  |  |  |
Revenues |  | 2,958 | 2,417 | 8,263 | 6,767
Corporate, Non-Segment [Member] |  |  |  |  |
Revenues | [1] | 0 | 229 | 0 | 2,442
Corporate, Non-Segment [Member] | Consumables [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 0 | 229 | 0 | 2,415
Corporate, Non-Segment [Member] | Hardware and Software [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Corporate, Non-Segment [Member] | Service [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 27
Corporate, Non-Segment [Member] | Service [Member] | Transferred over Time [Member] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Sterilization and Disinfection Control [Member] | Operating Segments [Member] |  |  |  |  |
Revenues | [1] | 13,077 | 11,619 | 37,696 | 35,823
Sterilization and Disinfection Control [Member] | Operating Segments [Member] | Consumables [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 11,250 | 9,948 | 32,252 | 30,487
Sterilization and Disinfection Control [Member] | Operating Segments [Member] | Hardware and Software [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 151 | 95 | 388 | 429
Sterilization and Disinfection Control [Member] | Operating Segments [Member] | Service [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 433 | 360 | 1,389 | 1,301
Sterilization and Disinfection Control [Member] | Operating Segments [Member] | Service [Member] | Transferred over Time [Member] |  |  |  |  |
Revenues |  | 1,243 | 1,216 | 3,667 | 3,606
Instruments [Member] | Operating Segments [Member] |  |  |  |  |
Revenues | [1] | 8,971 | 10,014 | 24,209 | 28,518
Instruments [Member] | Operating Segments [Member] | Consumables [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 717 | 781 | 2,240 | 2,364
Instruments [Member] | Operating Segments [Member] | Hardware and Software [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 6,210 | 6,881 | 16,045 | 19,282
Instruments [Member] | Operating Segments [Member] | Service [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 2,042 | 2,352 | 5,922 | 6,872
Instruments [Member] | Operating Segments [Member] | Service [Member] | Transferred over Time [Member] |  |  |  |  |
Revenues |  | 2 | 0 | 2 | 0
Biopharmaceutical Development [Member] | Operating Segments [Member] |  |  |  |  |
Revenues | [1] | 8,711 | 5,637 | 23,791 | 5,637
Biopharmaceutical Development [Member] | Operating Segments [Member] | Consumables [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 3,406 | 1,941 | 8,583 | 1,941
Biopharmaceutical Development [Member] | Operating Segments [Member] | Hardware and Software [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 3,771 | 2,571 | 10,518 | 2,571
Biopharmaceutical Development [Member] | Operating Segments [Member] | Service [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 506 | 656 | 2,293 | 656
Biopharmaceutical Development [Member] | Operating Segments [Member] | Service [Member] | Transferred over Time [Member] |  |  |  |  |
Revenues |  | 1,028 | 469 | 2,397 | 469
Continuous Monitoring [Member] | Operating Segments [Member] |  |  |  |  |
Revenues |  | 3,413 | 4,156 | 10,277 | 11,059
Continuous Monitoring [Member] | Operating Segments [Member] | Consumables [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 9 | 13 | 54 | 34
Continuous Monitoring [Member] | Operating Segments [Member] | Hardware and Software [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 1,920 | 2,562 | 6,082 | 6,374
Continuous Monitoring [Member] | Operating Segments [Member] | Service [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Revenues |  | 799 | 849 | 1,944 | 1,959
Continuous Monitoring [Member] | Operating Segments [Member] | Service [Member] | Transferred over Time [Member] |  |  |  |  |
Revenues |  | $ 685 | $ 732 | $ 2,197 | $ 2,692
[1] | Intersegment revenues are not significant and are eliminated to arrive at consolidated totals.

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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