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QUARTERLY INFORMATION (UNAUDITED) (Tables) | 12 Months Ended
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Sep. 30, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Data | The following table sets forth selected quarterly financial data for 2017, 2016, and 2015 (shown in thousands except per share data):
| 2017 (by quarter)
| 1 |  | 2 |  | 3 |  | 4
Revenue | $ | 9,269 |  |  | $ | 11,419 |  |  | $ | 11,798 |  |  | $ | 12,904 |
Cost of revenue | 891 |  |  | 830 |  |  | 1,182 |  |  | 1,138 |
Operating expenses | 9,050 |  |  | 9,365 |  |  | 10,132 |  |  | 10,033 |
Operating income (loss) | (672 | ) |  | 1,224 |  |  | 484 |  |  | 1,733 |
Other income, net | 65 |  |  | 67 |  |  | 149 |  |  | 121 |
Income tax benefit (provision) | — |  |  | (74 | ) |  | (17 | ) |  | 11,012 |
Net income (loss) | (607 | ) |  | 1,217 |  |  | 616 |  |  | 12,866 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Basic income (loss) per share | (0.02 | ) |  | 0.04 |  |  | 0.02 |  |  | 0.38 |
Shares used in calculating net income (loss) per share - basic | 32,377 |  |  | 32,786 |  |  | 33,024 |  |  | 33,522 |
Diluted income (loss) per share | (0.02 | ) |  | 0.03 |  |  | 0.02 |  |  | 0.35 |
Shares used in calculating net income (loss) per share - diluted | 32,377 |  |  | 34,815 |  |  | 35,610 |  |  | 36,251 |
| 2016 (by quarter)
| 1 |  | 2 |  | 3 |  | 4
Revenue | $ | 7,404 |  |  | $ | 8,522 |  |  | $ | 9,105 |  |  | $ | 9,670 |
Cost of revenue | 942 |  |  | 720 |  |  | 793 |  |  | 940 |
Operating expenses | 6,804 |  |  | 7,171 |  |  | 7,618 |  |  | 7,889 |
Operating income (loss) | (342 | ) |  | 631 |  |  | 694 |  |  | 841 |
Other income, net | 36 |  |  | 30 |  |  | 45 |  |  | 23 |
Income tax benefit (provision) | (16 | ) |  | (79 | ) |  | — |  |  | 96 |
Net income (loss) | (322 | ) |  | 582 |  |  | 739 |  |  | 960 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Basic income (loss) per share | (0.01 | ) |  | 0.02 |  |  | 0.02 |  |  | 0.03 |
Shares used in calculating net income (loss) per share - basic | 31,094 |  |  | 31,326 |  |  | 31,823 |  |  | 32,086 |
Diluted income (loss) per share | (0.01 | ) |  | 0.02 |  |  | 0.02 |  |  | 0.03 |
Shares used in calculating net income (loss) per share - diluted | 31,094 |  |  | 33,134 |  |  | 34,532 |  |  | 34,860 |
| 2015 (by quarter)
| 1 |  | 2 |  | 3 |  | 4
Revenue | $ | 5,389 |  |  | $ | 5,672 |  |  | $ | 6,440 |  |  | $ | 7,866 |
Cost of revenue | 497 |  |  | 558 |  |  | 591 |  |  | 825 |
Operating expenses | 4,758 |  |  | 4,628 |  |  | 5,539 |  |  | 6,079 |
Operating income | 134 |  |  | 486 |  |  | 310 |  |  | 962 |
Other income, net | 15 |  |  | 21 |  |  | 30 |  |  | 25 |
Income tax benefit (provision) | (3 | ) |  | — |  |  | 578 |  |  | (32 | )
Net income | 146 |  |  | 507 |  |  | 918 |  |  | 955 |
Net income per share: |  |  |  |  |  |  |  |  |  |  |
Basic income per share | — |  |  | 0.02 |  |  | 0.03 |  |  | 0.03 |
Shares used in calculating net income per share - basic | 30,618 |  |  | 30,697 |  |  | 30,765 |  |  | 30,969 |
Diluted income per share | — |  |  | 0.02 |  |  | 0.03 |  |  | 0.03 |
Shares used in calculating net income per share - diluted | 31,174 |  |  | 31,321 |  |  | 31,646 |  |  | 31,664 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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