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Recent Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Oct. 01, 2018 | Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |
Cumulative effect of initial application | $ 158 |  | $ 158 |  |  |
Income Statement [Abstract] |  |  |  |  |  |
Total sales | 21,570 |  | 56,900 |  |  |
Cost of sales | 16,731 | $ 14,833 | 43,966 | $ 39,720 |  |
Gross profit | 4,839 | 5,211 | 12,934 | 13,558 |  |
Operating income (loss) | 145 | 222 | (611) | (476) |  |
Income tax expense (benefit) | (326) | 249 | (466) | 1,225 |  |
Net income (loss) | 532 | 431 | (37) | (1,288) |  |
Net income (loss) attributable to common stockholders | $ 509 | $ 3 | $ (37) | $ (1,791) |  |
Basic earnings per share (dollars per share) | $ 0.13 |  | $ (0.01) | $ (0.47) |  |
Diluted earnings per share (dollars per share) | $ 0.12 |  | $ (0.01) | $ (0.47) |  |
Assets: |  |  |  |  |  |
Accounts receivable | $ 16,645 |  | $ 16,645 |  |  | $ 11,980
Unbilled accounts receivable |  |  |  |  |  | 1,166
Inventories | 9,868 |  | 9,868 |  |  | 7,558
Other current assets | 3,719 |  | 3,719 |  |  | 1,878
Deferred tax asset | 1,873 |  | 1,873 |  |  | 1,895
Liabilities: |  |  |  |  |  |
Deferred revenue | 791 |  | 791 |  |  |
Shareholders' Equity: |  |  |  |  |  |
Retained earnings | 28,203 |  | 28,203 |  |  | $ 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 | 21,071 |  | 56,302 |  |  |
Cost of sales | 16,284 |  | 43,387 |  |  |
Gross profit | 4,787 |  | 12,915 |  |  |
Operating income (loss) | 93 |  | (630) |  |  |
Income tax expense (benefit) | (351) |  | (484) |  |  |
Net income (loss) | 505 |  | (38) |  |  |
Net income (loss) attributable to common stockholders | $ 505 |  | $ (38) |  |  |
Basic earnings per share (dollars per share) | $ 0.13 |  | $ (0.01) |  |  |
Diluted earnings per share (dollars per share) | $ 0.12 |  | $ (0.01) |  |  |
Assets: |  |  |  |  |  |
Accounts receivable | $ 16,475 |  | $ 16,475 |  |  |
Unbilled accounts receivable | 588 |  | 588 |  |  |
Inventories | 10,639 |  | 10,639 |  |  |
Other current assets | 3,125 |  | 3,125 |  |  |
Deferred tax asset | 1,914 |  | 1,914 |  |  |
Liabilities: |  |  |  |  |  |
Deferred revenue | 1,586 |  | 1,586 |  |  |
Shareholders' Equity: |  |  |  |  |  |
Retained earnings | 28,044 |  | 28,044 |  |  |
Effect of change Higher/(Lower) | Accounting Standards Update 2014-09 |  |  |  |  |  |
Income Statement [Abstract] |  |  |  |  |  |
Total sales | 499 |  | 598 |  |  |
Cost of sales | 447 |  | 579 |  |  |
Gross profit | 52 |  | 19 |  |  |
Operating income (loss) | 52 |  | 19 |  |  |
Income tax expense (benefit) | 25 |  | 18 |  |  |
Net income (loss) | 27 |  | 1 |  |  |
Net income (loss) attributable to common stockholders | 4 |  | 1 |  |  |
Assets: |  |  |  |  |  |
Accounts receivable | 170 |  | 170 |  |  |
Unbilled accounts receivable | (588) |  | (588) |  |  |
Inventories | (771) |  | (771) |  |  |
Other current assets | 594 |  | 594 |  |  |
Deferred tax asset | (41) |  | (41) |  |  |
Liabilities: |  |  |  |  |  |
Deferred revenue | (795) |  | (795) |  |  |
Shareholders' Equity: |  |  |  |  |  |
Retained earnings | $ 159 |  | $ 159 |  |  |

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