| In millions, except per share items | May-31-19 | May-31-18 | May-31-17 | May-31-16 | May-31-15 | May-31-14 | May-31-13 | May-31-12 |
| | 10-K | 10-K | 10-K/A | 10-K/A | 10-K | 10-K/A | 10-K | 10-K |
| Revenues: |
| NAU | 35.0 | 28.6 | 85.4 | 95.0 | 116.3 | 126.2 | 127.9 | 117.8 |
| Other | 2.2 | 2.4 | 1.2 | 1.1 | 1.6 | 1.6 | 1.3 | 1.1 |
| Total revenues [+] | 37.3 | 31.0 | 54.4 | 64.6 | 117.9 | 127.8 | 129.2 | 118.9 |
| Lease / rental | 1.4 | 1.4 | | | 1.2 | 1.1 | 1.1 | |
| Other | | | | | 7.9 | 9.1 | 10.3 | 8.0 |
| Revenue growth [+] | 20.3% | -43.1% | -15.8% | -45.2% | -7.7% | -1.1% | 8.6% | 11.3% |
| NAU | 22.7% | -66.6% | -10.1% | -18.3% | -7.8% | -1.3% | 8.5% | 11.8% |
| Other | -7.4% | 108.1% | 4.5% | -31.1% | 2.1% | 20.6% | 22.4% | -25.7% |
| Cost of goods sold | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Gross profit | 37.3 | 31.0 | 54.4 | 64.6 | 117.9 | 127.8 | 129.2 | 118.9 |
| Gross margin | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Selling, general and administrative | 30.3 | 30.5 | 61.6 | 72.2 | 73.3 | 85.3 | 82.9 | 77.5 |
| Other operating expenses | 13.9 | 11.7 | | | 32.8 | 36.2 | 36.3 | 32.3 |
| EBITDA [+] | -4.3 | -8.6 | -2.2 | -2.0 | 17.9 | 12.6 | 15.7 | 13.4 |
| EBITDA growth | -49.9% | 300.1% | 7.8% | -111.2% | 41.8% | -19.5% | 16.9% | -30.8% |
| EBITDA margin | -11.6% | -27.8% | -4.0% | -3.1% | 15.2% | 9.9% | 12.1% | 11.3% |
| Depreciation and amortization | 2.6 | 2.7 | 5.1 | 5.6 | 6.1 | 6.4 | 5.7 | 4.2 |
| EBIT [+] | -6.9 | -11.3 | -7.2 | -7.6 | 11.8 | 6.3 | 10.0 | 9.2 |
| EBIT growth | -38.9% | 55.9% | -4.7% | -164.6% | 87.9% | -37.5% | 9.3% | -44.5% |
| EBIT margin | -18.5% | -36.4% | -13.3% | -11.8% | 10.0% | 4.9% | 7.7% | 7.7% |
| Loss (gain) on sale of assets | | | | | | 0.1 | 0.1 | -0.3 |
| Interest expense, net [+] | 1.2 | 0.8 | | | 0.7 | 0.6 | 0.9 | 0.5 |
| Interest expense | 1.3 | 0.8 | | | 0.9 | 0.8 | 1.0 | 0.6 |
| Interest income | 0.1 | 0.1 | | | 0.1 | 0.1 | 0.1 | 0.1 |
| Other income (expense), net [+] | 0.0 | -0.1 | -0.5 | -0.6 | 0.2 | 0.1 | 0.1 | 0.1 |
| Gain (loss) on sale of assets | | | | | -1.7 | 0.1 | 0.1 | -0.3 |
| Other | 0.0 | -0.1 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 |
| Pre-tax income | -8.1 | -12.1 | -7.8 | -8.2 | 11.2 | 5.8 | 9.2 | 8.8 |
| Income taxes | 0.0 | 0.3 | -1.6 | -2.9 | 4.4 | 2.3 | 3.7 | 3.7 |
| Tax rate | 0.4% | | 19.9% | 35.3% | 39.6% | 39.9% | 40.3% | 41.8% |
| Minority interest | 0.0 | -0.1 | | | 0.0 | 0.0 | 0.0 | 0.1 |
| Earnings from continuing ops | -8.1 | -11.9 | -6.2 | -5.3 | 6.7 | 3.5 | 5.4 | 5.0 |
| Earnings from discontinued ops | -17.0 | -0.3 | | | | | | |
| Net income | -25.1 | -12.2 | -6.2 | -5.3 | 6.7 | 3.5 | 5.4 | 5.0 |
| Net margin | -67.3% | -39.3% | -11.4% | -8.2% | 5.7% | 2.7% | 4.2% | 4.2% |
| |
| Basic EPS [+] | ($0.33) | ($0.49) | ($0.26) | ($0.22) | $0.27 | $0.14 | $0.21 | $0.19 |
| Growth | -32.2% | 89.7% | 19.8% | -180.6% | 92.2% | -34.8% | 11.8% | -51.3% |
| Diluted EPS [+] | ($0.33) | ($0.49) | ($0.26) | ($0.22) | $0.27 | $0.14 | $0.21 | $0.19 |
| Growth | -32.2% | 89.7% | 19.8% | -180.6% | 92.2% | -34.8% | 12.4% | -50.5% |
| |
| Dividends per share [+] | | $0.09 | $0.18 | $0.18 | $0.18 | $0.18 | $0.15 | $0.13 |
| Growth | -100.0% | -50.0% | 0.1% | 0.0% | 2.9% | 14.4% | 21.0% | -75.2% |
| |
| Shares outstanding (basic) [+] | 24.4 | 24.2 | 24.2 | 24.7 | 25.2 | 25.1 | 25.6 | 26.5 |
| Growth | 0.7% | 0.4% | -2.0% | -2.0% | 0.3% | -1.8% | -3.5% | 1.0% |
| Shares outstanding (diluted) [+] | 24.4 | 24.2 | 24.2 | 24.7 | 25.2 | 25.1 | 25.6 | 26.6 |
| Growth | 0.7% | 0.4% | -2.0% | -2.0% | 0.3% | -1.8% | -4.0% | -0.7% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |