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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2016
Accounting Policies [Abstract] |
Potentially Dilutive Common Shares Excluded from Net Income (Loss) per Share Calculation | At September 30, 2016, 2015 and 2014, the following potentially dilutive common shares were excluded from the net income (loss) per share calculation, as they would have been antidilutive:
|  | 2016 |  |  | 2015 |  |  | 2014 |
Stock options |  |  | 1,258,844 |  |  |  | 2,202,844 |  |  |  | 2,334,326 |
Warrants |  |  | — |  |  |  | — |  |  |  | 6,667 |
Restricted stock units |  |  | 623,883 |  |  |  | 287,147 |  |  |  | 1,101,303 |
IDchecker shares |  |  | 349,239 |  |  |  | 63,037 |  |  |  | — |
Total potentially dilutive common shares outstanding |  |  | 2,231,966 |  |  |  | 2,553,028 |  |  |  | 3,442,296 |
Computation of Basic and Diluted Net Income (Loss) Per Share | The computation of basic and diluted net income (loss) per share for the fiscal years ended September 30, 2016, 2015 and 2014 is as follows (amounts in thousands, except share data):
|  | 2016 |  |  | 2015 |  |  | 2014 |
Net income (loss) |  | $ | 1,959 |  |  | $ | 2,526 |  |  | $ | (5,292 | )
Weighted-average common shares and share equivalents outstanding—basic |  |  | 31,586,535 |  |  |  | 30,790,258 |  |  |  | 30,466,063 |
Dilutive potential common stock equivalents |  |  | 2,231,966 |  |  |  | 689,983 |  |  |  | — |
Weighted-average common shares and share equivalents outstanding—diluted |  |  | 33,818,501 |  |  |  | 31,480,241 |  |  |  | 30,466,063 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.06 |  |  | $ | 0.08 |  |  | $ | (0.17 | )
Diluted |  | $ | 0.06 |  |  | $ | 0.08 |  |  | $ | (0.17 | )
Summary of Property and Equipment | The following is a summary of property and equipment as of September 30, 2016 and 2015 (amounts shown in thousands):
|  | 2016 |  |  | 2015 |
Property and equipment—at cost: |  |  |  |  |  |  |  |
Equipment |  | $ | 1,476 |  |  | $ | 1,281 |
Furniture and fixtures |  |  | 249 |  |  |  | 229 |
Leasehold improvements |  |  | 1,018 |  |  |  | 995 |
|  |  | 2,743 |  |  |  | 2,505 |
Less: accumulated depreciation and amortization |  |  | (2,303 | ) |  |  | (1,530 | )
Total property and equipment, net |  | $ | 440 |  |  | $ | 975 |
Components of Comprehensive Loss | The following table summarizes the components of comprehensive loss for the fiscal years ended September 30, 2016, 2015 and 2014 (amounts shown in thousands):
|  | 2016 |  |  | 2015 |  |  | 2014 |
Net income (loss) |  | $ | 1,959 |  |  | $ | 2,526 |  |  | $ | (5,292 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment |  |  | (46 | ) |  |  | — |  |  |  | — |
Change in unrealized gains (losses) on marketable securities |  |  | 7 |  |  |  | 5 |  |  |  | (10 | )
Total comprehensive income (loss) |  | $ | 1,920 |  |  | $ | 2,531 |  |  | $ | (5,302 | )

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