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Equity and Stock-Based Compensation - Additional Information (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 10, 2020 | Nov. 29, 2018 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Sep. 30, 2019
Equity [Abstract] |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  | $ 100,000 |  | $ 200,000 | $ 133,000 | $ 363,000 |
Authorized stock repurchase amount | $ 4,000,000 | $ 4,000,000 |  |  |  |  |  |
Common stock, par value |  | $ 0.01 | $ 0.01 |  |  | $ 0.01 |  | $ 0.01
Stock repurchase program period | 1 year | 1 year |  |  |  |  |  |
Shares repurchased and retired during the period |  |  | 366,000 | 0 |  |  |  |
Total cost of shares repurchased and retired |  |  | $ 2,000,000 |  |  |  |  |
Average price per share of shares repurchased |  |  | $ 5.46 |  |  |  |  |
Remaining authorized amount available for repurchase |  |  | $ 2,000,000 |  |  | $ 2,000,000 |  |

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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