| In millions, except per share items | Mar-31-18 | Mar-31-17 | Mar-31-16 | Mar-31-15 | Mar-31-14 | Mar-31-13 | Mar-31-12 | Mar-31-11 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 188.0 | 162.2 | 133.1 | 139.2 | 156.7 | 150.2 | 141.6 | 146.5 |
| Revenues growth | 15.9% | 21.8% | -4.4% | -11.2% | 4.3% | 6.1% | -3.4% | 0.5% |
| Cost of revenues | 167.8 | 143.9 | 118.2 | 119.9 | 135.9 | 130.0 | 124.5 | 126.4 |
| Gross profit | 20.2 | 18.3 | 14.9 | 19.3 | 20.9 | 20.2 | 17.1 | 20.1 |
| Gross margin | 10.7% | 11.3% | 11.2% | 13.9% | 13.3% | 13.5% | 12.1% | 13.7% |
| |
| Operating expenses | | | | | | | | |
| General and administrative | 18.7 | 18.3 | 18.7 | 17.5 | 17.9 | 18.2 | 15.9 | 16.6 |
| Provision for (recoveries of) doubtful accounts, net | -0.1 | -0.1 | 0.4 | -0.1 | 0.4 | 0.4 | 0.3 | 0.3 |
| Total operating expenses | 37.3 | 36.5 | 19.1 | 34.9 | 39.5 | 39.8 | 34.8 | 16.8 |
| Operating income | 1.5 | 0.1 | -4.2 | 1.9 | 2.6 | 1.7 | 1.0 | 3.3 |
| Operating margin | 0.8% | 0.1% | -3.2% | 1.4% | 1.7% | 1.1% | 0.7% | 2.3% |
| |
| Other expenses | | | | | | | | |
| Interest expense | -0.6 | -0.3 | -0.2 | -0.2 | -0.2 | -0.1 | -0.3 | -0.3 |
| Income before income taxes and equity loss in minority investment of unconsolidated affiliate | 1.0 | -0.2 | -4.4 | 1.7 | 2.4 | 1.5 | 0.6 | 3.0 |
| Equity loss in minority investment of unconsolidated affiliate | -0.1 | -0.1 | 0.1 | 0.5 | | | | |
| Income before income taxes | 0.5 | -2.4 | -4.3 | 2.2 | 2.4 | | | |
| Provision for income taxes | 1.9 | -0.1 | -1.6 | 1.0 | 1.3 | 1.0 | 0.4 | 1.4 |
| Tax rate | 193.0% | 28.2% | 37.6% | 56.5% | 53.9% | 67.7% | 74.7% | 46.6% |
| Net income (loss) | -1.4 | -2.3 | -2.7 | 1.3 | 1.1 | 0.5 | 0.1 | 1.6 |
| |
| Income (loss) per share of common stock | | | | | | | | |
| Basic | ($0.14) | ($0.24) | ($0.27) | $0.13 | $0.12 | $0.05 | $0.01 | $0.15 |
| Diluted | ($0.14) | ($0.24) | ($0.27) | $0.13 | $0.12 | $0.05 | $0.01 | $0.15 |
| |
| Weighted average number of common shares outstanding | | | | | | | | |
| Basic | 9.9 | 9.8 | 9.8 | 9.6 | 9.2 | 9.5 | 10.7 | 10.9 |
| Diluted | 9.9 | 9.8 | 9.8 | 9.9 | 9.5 | 9.6 | 10.8 | 11.1 |