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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Oct. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Cumulative effect of initial application |  | $ 158 |
Income Statement [Abstract] |  |  |
Total sales | $ 79,061 |  |
Total cost of sales | 61,035 | 54,517 |
Gross profit | 18,026 | 18,399 |
Operating loss | (826) | (1,601) |
Income tax benefit | (71) | 882 |
Loss from continuing operations | (371) | (1,988) |
Net (loss) income attributable to common stockholders | $ (371) | $ 13,842 |
Basic earnings per share (dollars per share) | $ (0.09) | $ 3.62 |
Diluted earnings per share (dollars per share) | $ (0.09) | $ 3.55 |
Assets: |  |  |
Accounts receivable | $ 15,114 | $ 11,980 |
Unbilled accounts receivable |  | 1,166 |
Inventories | 7,818 | 7,558 |
Other current assets | 4,649 | 1,878 |
Deferred tax asset | 1,946 | 1,895 |
Liabilities: |  |  |
Deferred revenue | 741 |  |
Shareholders' Equity: |  |  |
Retained earnings | 27,246 | $ 29,926 |
Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Cumulative effect of initial application |  |  | $ 158
Balances without adoption of ASC 606 | Accounting Standards Update 2014-09 |  |  |
Income Statement [Abstract] |  |  |
Total sales | 78,563 |  |
Total cost of sales | 60,567 |  |
Gross profit | 17,996 |  |
Operating loss | (856) |  |
Income tax benefit | (76) |  |
Loss from continuing operations | (396) |  |
Net (loss) income attributable to common stockholders | $ (396) |  |
Basic earnings per share (dollars per share) | $ (0.10) |  |
Diluted earnings per share (dollars per share) | $ (0.10) |  |
Assets: |  |  |
Accounts receivable | $ 14,929 |  |
Unbilled accounts receivable | 565 |  |
Inventories | 8,484 |  |
Other current assets | 4,069 |  |
Deferred tax asset | 2,000 |  |
Liabilities: |  |  |
Deferred revenue | 1,444 |  |
Shareholders' Equity: |  |  |
Retained earnings | 27,063 |  |
Effect of change Higher/(Lower) | Accounting Standards Update 2014-09 |  |  |
Income Statement [Abstract] |  |  |
Total sales | 498 |  |
Total cost of sales | 468 |  |
Gross profit | 30 |  |
Operating loss | 30 |  |
Income tax benefit | 5 |  |
Loss from continuing operations | 25 |  |
Net (loss) income attributable to common stockholders | $ 25 |  |
Basic earnings per share (dollars per share) | $ 0.01 |  |
Diluted earnings per share (dollars per share) | $ 0.01 |  |
Assets: |  |  |
Accounts receivable | $ 185 |  |
Unbilled accounts receivable | (565) |  |
Inventories | (666) |  |
Other current assets | 580 |  |
Deferred tax asset | (54) |  |
Liabilities: |  |  |
Deferred revenue | (703) |  |
Shareholders' Equity: |  |  |
Retained earnings | $ 183 |  |

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