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Acquisitions (Tables) | 9 Months Ended
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Jun. 30, 2020
Business Combinations [Abstract] |
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] | The following table summarizes the preliminary values of Opengear assets acquired and liabilities assumed as of the acquisition date (in thousands):
Cash |  | $ | 148,058 |
Contingent consideration |  | 5,100 |
Total |  | $ | 153,158 |
Fair value of net tangible assets acquired |  | $ | 20,086 |
Identifiable intangible assets: |  |
Customer relationships |  | 79,000 |
Purchased and core technology |  | 18,100 |
Trademarks |  | 8,000 |
Deferred tax liability on identifiable intangible assets |  | (25,634) |
Goodwill |  | 53,606 |
Total |  | $ | 153,158 |
Business Acquisition, Pro Forma Information [Table Text Block] | The following consolidated pro forma information is presented as if the acquisition had occurred on October 1, 2018 (in thousands):
| Three months ended June 30, |  |  |  | Nine months ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Net sales | $ | 70,338 |  |  | $ | 74,946 |  |  | $ | 220,998 |  |  | $ | 229,831 |
Net income | $ | 2,411 |  |  | $ | 3,064 |  |  | $ | 9,847 |  |  | $ | 7,901 |
Net income per share - basic | $ | 0.08 |  |  | $ | 0.11 |  |  | $ | 0.34 |  |  | $ | 0.28 |
Net income per share - diluted | $ | 0.08 |  |  | $ | 0.11 |  |  | $ | 0.33 |  |  | $ | 0.28 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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