| In millions, except per share items | Sep-30-22 | Sep-30-21 | Sep-30-20 | Sep-30-19 | Sep-30-18 | Sep-30-17 | Sep-30-16 | Sep-30-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A | 10-K | 10-K |
| Revenues [+] | 87.9 | 81.3 | 88.7 | 108.7 | 114.1 | 112.2 | 120.2 | 122.9 |
| Services | | | | | | | | 111.3 |
| Oil & gas services | | | | | | | | 11.6 |
| Revenue growth | 8.1% | -8.4% | -18.4% | -4.7% | 1.7% | -6.7% | -2.2% | -4.9% |
| Cost of goods sold [+] | 54.2 | 49.1 | 53.3 | 68.2 | 72.6 | 70.2 | 74.0 | 69.3 |
| Labor costs | 37.9 | 36.2 | 39.4 | 47.5 | 48.0 | 48.1 | 51.1 | 49.1 |
| Fuel costs | 13.3 | 9.6 | 10.3 | 15.8 | 17.4 | 15.0 | | |
| Maintenance and operations costs | 3.0 | 3.3 | 3.6 | 4.8 | 7.2 | 7.1 | 7.8 | |
| Oil & gas services costs | | | | | | | 15.2 | 20.3 |
| Gross profit | 33.7 | 32.2 | 35.4 | 40.6 | 41.4 | 42.0 | 46.2 | 53.5 |
| Gross margin | 38.3% | 39.6% | 39.9% | 37.3% | 36.3% | 37.4% | 38.4% | 43.6% |
| Selling, general and administrative [+] | 19.5 | 18.0 | 19.7 | 21.6 | 23.6 | 22.8 | 22.9 | 10.2 |
| Sales and marketing | 9.3 | 8.8 | 8.9 | 9.9 | 9.7 | 9.4 | 9.6 | |
| General and administrative [+] | 10.2 | 9.2 | 10.8 | 11.7 | 13.9 | 13.4 | 13.3 | 10.2 |
| General and administrative expenses | 2.0 | 1.9 | 2.1 | 2.3 | 2.1 | 2.7 | 2.9 | |
| Insurance expense | 8.2 | 7.3 | 8.6 | 9.4 | 11.7 | 10.7 | 10.4 | 10.2 |
| Other selling, general and administrative | 9.3 | 8.8 | 8.9 | 9.9 | 9.7 | 9.4 | 9.6 | |
| Other operating expenses | 4.9 | 13.3 | 15.5 | 17.0 | 15.8 | 16.8 | 15.4 | 37.8 |
| EBITDA [+] | 15.4 | 8.1 | 8.2 | 10.5 | 11.5 | 12.7 | 17.5 | 15.0 |
| EBITDA growth | 90.6% | -1.7% | -21.4% | -9.2% | -9.1% | -27.7% | 17.1% | 3.0% |
| EBITDA margin | 17.5% | 9.9% | 9.3% | 9.6% | 10.1% | 11.3% | 14.6% | 12.2% |
| Depreciation | 5.9 | 7.2 | 8.0 | 8.5 | 9.5 | 10.3 | 9.7 | 9.5 |
| EBITA | 9.5 | 0.9 | 0.2 | 2.0 | 2.0 | 2.4 | 7.8 | 5.5 |
| EBITA margin | 10.8% | 1.1% | 0.3% | 1.8% | 1.8% | 2.1% | 6.5% | 4.5% |
| Amortization of intangibles | 0.2 | | | | | | | |
| EBIT [+] | 9.3 | 0.9 | 0.2 | 2.0 | 2.0 | 2.4 | 7.8 | 5.5 |
| EBIT growth | 956.7% | 262.1% | -87.7% | -3.3% | -13.7% | -69.6% | 42.3% | 4.7% |
| EBIT margin | 10.6% | 1.1% | 0.3% | 1.8% | 1.8% | 2.1% | 6.5% | 4.5% |
| Interest expense | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | |
| Interest expense | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 |
| Other income (expense), net [+] | 0.1 | 0.0 | 0.1 | 0.4 | 0.2 | 0.0 | 1.7 | 0.1 |
| Gain (loss) on sale of assets | -8.3 | -1.6 | -0.8 | -0.9 | -1.0 | -0.6 | -0.7 | |
| Other non-operating, non-recurring income | | | | | | | 1.7 | |
| Pre-tax income | 9.3 | 0.9 | 0.3 | 2.4 | 2.2 | 2.3 | 9.4 | 5.5 |
| Income taxes | 2.2 | 0.2 | 0.1 | 0.6 | -2.9 | 0.5 | 3.6 | 2.1 |
| Tax rate | 23.0% | 27.2% | 25.9% | 26.3% | | 20.4% | 39.0% | 39.0% |
| Net income | 7.2 | 0.6 | 0.3 | 1.8 | 5.1 | 1.8 | 5.7 | 3.3 |
| Net margin | 8.2% | 0.8% | 0.3% | 1.6% | 4.5% | 1.6% | 4.7% | 2.7% |
| |
| Basic EPS [+] | $2.08 | $0.18 | $0.08 | $0.53 | $1.54 | $0.55 | $1.74 | $1.02 |
| Growth | 1029.1% | 141.3% | -85.5% | -65.8% | 178.3% | -68.1% | 70.1% | 3.6% |
| Diluted EPS [+] | $1.98 | $0.18 | $0.08 | $0.53 | $1.54 | $0.55 | $1.74 | $1.02 |
| Growth | 982.1% | 140.5% | -85.5% | -65.8% | 178.4% | -68.1% | 70.3% | 3.4% |
| |
| Dividends per share [+] | $3.75 | $3.00 | $3.15 | | | | | |
| Growth | 25.0% | -4.8% | | | | | | |
| |
| Shares outstanding (basic) [+] | 3.5 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 |
| Growth | 1.9% | 0.8% | 0.8% | 0.7% | 0.6% | 0.5% | 0.5% | 0.8% |
| Shares outstanding (diluted) [+] | 3.6 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 |
| Growth | 6.3% | 1.1% | 0.8% | 0.7% | 0.5% | 0.5% | 0.3% | 1.0% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |