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Loss Per Common Share | 6 Months Ended
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Mar. 31, 2020
Earnings Per Share [Abstract] |
Loss Per Common Share | 12. Loss Per Common Share The following table summarizes the calculation of net loss and weighted average common shares and common equivalent shares outstanding for purposes of the computation of loss per share (in thousands, except share and per share data):
|  | Three Months Ended |  |  | Six Months Ended |
|  | March 31, 2020 |  |  | March 31, 2019 |  |  | March 31, 2020 |  |  | March 31, 2019 |
Net income (loss) |  | $ | (11,804 | ) |  | $ | 707 |  |  | $ | (13,093 | ) |  | $ | (5,146 | )
Less: Income (loss) allocable to unvested restricted stock |  |  | — |  |  |  | (12 | ) |  |  | — |  |  |  | — |
Income (loss) attributable to common shareholders for diluted earnings per share |  | $ | (11,804 | ) |  | $ | 695 |  |  | $ | (13,093 | ) |  | $ | (5,146 | )
Weighted average number of common share equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares used in basic income (loss) per share |  |  | 13,541,404 |  |  |  | 13,401,135 |  |  |  | 13,503,486 |  |  |  | 13,369,932 |
Common share equivalents outstanding related to stock options and RSUs |  |  | — |  |  |  | 156,050 |  |  |  | — |  |  |  | — |
Total weighted average common shares and common share equivalents used in diluted income (loss) per share |  |  | 13,541,404 |  |  |  | 13,557,185 |  |  |  | 13,503,486 |  |  |  | 13,369,932 |
Income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.87 | ) |  | $ | 0.05 |  |  | $ | (0.97 | ) |  | $ | (0.38 | )
Diluted |  | $ | (0.87 | ) |  | $ | 0.05 |  |  | $ | (0.97 | ) |  | $ | (0.38 | )
For the calculation of diluted loss per share for the three and six months ended March 31, 2020, 103,100 stock options and 265,220 non-vested RSUs were excluded in the calculation of weighted average shares outstanding since their impact on diluted loss per share was antidilutive. For the calculation of diluted loss per share for the six months ended March 31, 2019, 165,600 stock options and 161,300 non-vested RSUs, respectively, were excluded in the calculation of weighted average shares outstanding since their impact on diluted loss per share was antidilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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