| In millions, except per share items | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-05-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 |
| | 10-K | 10-K | 10-K | 8-K | 10-K | 10-K | 10-K | 10-K |
| ASSETS | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 17.8 | 15.8 | 25.0 | 25.0 | 11.6 | 13.0 | 9.5 | 15.0 |
| Accounts receivable, net of allowances of $1,088 and $1,143 | 142.8 | 156.7 | 123.2 | 123.2 | 83.8 | 57.6 | 75.7 | 46.6 |
| Income tax receivable | | 0.4 | | | 2.8 | 1.2 | | |
| Inventories | 144.9 | 82.9 | 75.0 | 75.0 | 72.8 | 45.9 | 48.4 | 44.5 |
| Prepaid expenses and other current assets | 6.1 | 5.5 | 4.5 | 4.5 | 3.4 | 3.1 | 2.7 | 2.4 |
| Total current assets | 311.7 | 261.2 | 227.8 | 227.8 | 174.4 | 131.7 | 147.0 | 116.5 |
| Property and equipment, net of accumulated depreciation of $14,354 and $14,159 | 18.0 | 16.1 | 13.4 | | 17.8 | 8.3 | 7.3 | 5.0 |
| Intangible assets, net of accumulated amortization of $105,168 and $95,632 | 63.1 | 52.1 | 39.2 | | 53.4 | 23.0 | 31.4 | 41.2 |
| Deferred income tax assets, net | 22.7 | 19.4 | 24.4 | | 50.4 | 15.4 | 14.3 | 11.4 |
| Operating lease right of use assets | 9.6 | | | | | | | |
| Goodwill | 43.6 | 27.6 | 12.3 | | 12.3 | | | |
| Other assets | 0.6 | 1.6 | 3.4 | | 2.5 | 1.1 | 0.5 | 0.6 |
| Total assets | 469.2 | 378.0 | 320.6 | 227.8 | 310.7 | 179.5 | 201.3 | 175.5 |
| |
| LIABILITIES AND STOCKHOLDERS’ EQUITY | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Accounts payable | 87.3 | 80.9 | 96.5 | 96.5 | 85.0 | 33.8 | 49.4 | 15.2 |
| Income tax payable | 5.3 | | 2.1 | 2.1 | | | 6.5 | 6.4 |
| Sales returns liability | 43.9 | 54.4 | 34.5 | | 28.4 | 7.8 | 8.7 | 7.9 |
| Accrued wages and wage-related expenses | 6.3 | 6.6 | 5.7 | | 6.2 | 2.2 | 2.6 | 0.9 |
| Accrued liabilities | 15.2 | 13.7 | 8.2 | 8.2 | 22.2 | 5.1 | 6.9 | 2.6 |
| Current portion of operating lease liabilities | 2.1 | | | | | | | |
| Total current liabilities | 160.0 | 155.7 | 184.6 | 130.5 | 183.8 | 49.0 | 74.2 | 33.1 |
| Line of credit | | | | | | | | 17.5 |
| Operating lease liabilities | 10.6 | | | | | | | |
| Other long-term liabilities | | 5.5 | | | | | | |
| Total liabilities | 277.8 | 219.5 | 184.6 | 130.5 | 193.5 | 49.0 | 74.2 | 50.6 |
| |
| Commitments and contingencies (Note 12 and Note 13) | | | | | | | | |
| Stockholders’ equity: | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Treasury stock, 7,055 and 7,055 common shares at cost | -50.5 | -49.7 | -37.6 | -37.6 | -36.1 | -35.2 | -19.6 | -10.0 |
| Additional paid-in capital | 116.5 | 96.5 | 96.1 | 96.1 | 92.8 | 89.0 | 85.2 | 82.8 |
| Accumulated other comprehensive loss | -1.6 | -1.4 | -0.3 | -0.3 | -2.1 | | | |
| Retained earnings | 127.0 | 113.1 | 77.8 | 77.8 | 62.7 | 78.3 | 62.7 | 52.2 |
| Total stockholders’ equity | 191.5 | 158.5 | 136.0 | | 117.3 | 130.5 | 127.1 | 124.8 |
| Total liabilities and stockholders’ equity | 469.2 | 378.0 | 320.6 | | 310.7 | 179.5 | 201.3 | 175.5 |