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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2021
Accounting Policies [Abstract] |
Accounts Receivable, Allowance for Credit Loss | The following table presents a reconciliation of the allowance for credit losses (in thousands):
|  | Year ended September 30,
|  | 2021 |  | 2020
Balance at beginning of period |  | $ | 3,778 |  |  | $ | 968 |
Additions |  | 2,803 |  |  | 2,534 |
Uncollectible accounts charged to allowance, net of recoveries |  | (2,647) |  |  | 276 |
Balance at end of period |  | $ | 3,934 |  |  | $ | 3,778 |
Schedule of Calculation of Numerator and Denominator in Earnings Per Share | The following table is a reconciliation of the numerators and denominators in the net income per common share calculations (in thousands, except per common share data):
| Year ended September 30,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income | $ | 10,366 |  |  | $ | 8,411 |  |  | $ | 9,958 |
Denominator: |  |  |  |  |
Denominator basic net income per common share — weighted average shares outstanding | 32,111 |  |  | 28,849 |  |  | 27,905 |
Effect of dilutive securities: |  |  |  |  |
Stock options and restricted stock units | 1,283 |  |  | 697 |  |  | 649 |
Denominator diluted net income per common share — adjusted weighted average shares | 33,394 |  |  | 29,546 |  |  | 28,554 |
Net income per common share, basic | $ | 0.32 |  |  | $ | 0.29 |  |  | $ | 0.36 |
Net income per common share, diluted | $ | 0.31 |  |  | $ | 0.28 |  |  | $ | 0.35 |

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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