| In millions, except per share items | Sep-30-13 | Jun-30-13 | Mar-31-13 | Dec-31-12 | Sep-30-12 | Jun-30-12 | Mar-31-12 | Dec-31-11 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Assets | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 91.0 | 87.3 | 71.4 | 73.6 | 70.0 | 72.2 | 63.4 | 50.4 |
| Accounts receivable, net | 49.7 | 58.4 | 62.0 | 56.0 | 59.3 | 59.2 | 59.2 | 68.9 |
| Inventories | 44.3 | 35.4 | 67.1 | 78.1 | 68.2 | 63.4 | 46.1 | 49.6 |
| Prepaid expenses and other current assets | 5.6 | 4.1 | 4.4 | 4.8 | 4.3 | 4.1 | 5.5 | 6.1 |
| Deferred income taxes | 4.3 | 4.3 | 1.3 | 3.6 | 5.6 | 7.0 | 2.1 | |
| Total current assets | 366.2 | 360.7 | 378.2 | 390.1 | 378.1 | 379.2 | 176.3 | 174.8 |
| Fixed assets, net | 50.1 | 50.4 | 50.5 | 49.4 | 48.3 | 47.7 | 45.1 | 43.0 |
| Goodwill | 72.5 | 68.8 | 68.6 | 69.0 | 68.7 | 68.5 | 69.7 | 70.2 |
| Intangibles, net | 17.2 | 16.6 | 17.2 | 18.1 | 18.7 | 19.3 | 20.3 | 21.1 |
| Other assets | 1.5 | 1.3 | 1.5 | 1.4 | 1.3 | 1.3 | 1.3 | 2.0 |
| Total assets | 312.6 | 308.2 | 309.8 | 312.1 | 307.8 | 310.1 | 312.7 | 311.2 |
| |
| Liabilities and Stockholders' Equity | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Accounts payable | 21.3 | 21.9 | 30.9 | 34.7 | 34.0 | 34.0 | 40.1 | 41.1 |
| Deferred revenues | 6.4 | 4.3 | 5.2 | 6.7 | 6.0 | 4.6 | 7.0 | 16.9 |
| Accrued payroll and related fringe benefits | 4.5 | 3.3 | 4.8 | 4.5 | 5.5 | 6.7 | 7.0 | 5.9 |
| Other accrued expenses | 7.2 | 7.2 | 6.1 | 6.9 | 7.0 | 11.9 | 13.3 | 9.5 |
| Current portion of long-term debt | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 |
| Total current liabilities | 45.5 | 42.8 | 53.1 | 59.0 | 58.7 | 63.4 | 73.5 | 79.5 |
| Other liabilities | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 4.4 | 4.1 |
| Long term debt | 7.0 | 8.5 | 10.0 | 11.5 | 13.1 | 14.6 | 16.1 | 17.6 |
| Deferred income taxes | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.5 | 9.8 | 5.6 |
| |
| Commitments and contingencies | | | | | | | | |
| Stockholders' equity: | | | | | | | | |
| Series A Junior Participating, shares authorized, issued and outstanding: none at September 30, 2013 and June 30, 2013 | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 217.0 | 214.7 | 209.1 | 207.4 | 206.1 | 205.2 | 200.7 | 199.1 |
| Retained earnings | 33.6 | 33.4 | 28.9 | 24.7 | 20.9 | 18.2 | 11.1 | 8.2 |
| Treasury stock, at cost, 465,351 shares at September 30, 2013 and June 30, 2013 | -2.8 | -2.8 | -2.8 | -2.8 | -2.8 | -2.8 | -2.8 | -2.8 |
| Accumulated other comprehensive loss | -0.2 | -1.0 | -1.2 | -0.4 | -0.8 | -1.2 | -0.1 | -0.2 |
| Total stockholders' equity | 247.7 | 244.5 | 234.1 | 228.9 | 223.4 | 219.4 | 208.9 | 204.3 |
| Total liabilities and stockholders' equity | 312.6 | 308.2 | 309.8 | 312.1 | 307.8 | 310.1 | 312.7 | 311.2 |