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Summary of Company's Segment Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |
Revenue | $ 95,809 | $ 75,748
Income (loss) from operations | 1,033 | (20,743)
Depreciation and amortization expenses | 19,339 | 14,412
Impairment, inventory obsolescence and stock-based compensation expenses | 6,943 | 7,244
Interest income | 1,308 | 1,083
Interest expense | 99 | 336
Operating Segments | Oil and Gas Markets |  |
Segment Reporting Information [Line Items] |  |
Revenue | 64,966 | 44,951
Income (loss) from operations | 3,095 | (14,070)
Depreciation and amortization expenses | 16,865 | 13,348
Impairment, inventory obsolescence and stock-based compensation expenses | 6,046 | 6,243
Interest income | 1,033 | 614
Interest expense |  | 2
Operating Segments | Adjacent Markets |  |
Segment Reporting Information [Line Items] |  |
Revenue | 30,156 | 29,932
Income (loss) from operations | 6,234 | 5,345
Depreciation and amortization expenses | 466 | 490
Impairment, inventory obsolescence and stock-based compensation expenses | 92 | 164
Interest income | 1 |
Operating Segments | Emerging Markets |  |
Segment Reporting Information [Line Items] |  |
Revenue | 159 | 286
Income (loss) from operations | (2,306) | (718)
Depreciation and amortization expenses | 1,164 | 194
Impairment, inventory obsolescence and stock-based compensation expenses | 68 | 14
Interest expense |  | 1
Corporate |  |
Segment Reporting Information [Line Items] |  |
Revenue | 528 | 579
Income (loss) from operations | (5,990) | (11,300)
Depreciation and amortization expenses | 844 | 380
Impairment, inventory obsolescence and stock-based compensation expenses | 737 | 823
Interest income | 274 | 469
Interest expense | $ 99 | $ 333

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