| In millions, except per share items | Mar-31-15 | Dec-31-14 | Sep-30-14 | Jun-30-14 | Mar-31-14 | Dec-31-13 | Sep-30-13 | Jun-30-13 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Cash flows from operating activities | | | | | | | | |
| Net income | 7.2 | -6.3 | -32.1 | 18.7 | 1.3 | | 0.1 | 16.0 |
| |
| Adjustments to reconcile net income to net cash provided by operating activities | | | | | | | | |
| Depreciation and amortization | 0.1 | | 0.1 | 0.2 | 0.1 | | 0.0 | 0.1 |
| Loss on disposal of fixed asset | 0.0 | | | | | | | |
| Amortization of debt discount | 0.1 | | 0.3 | 0.3 | 0.1 | | 0.1 | 0.3 |
| Stock-based compensation expense | 2.4 | | 2.3 | 3.2 | 1.4 | | 1.3 | 1.8 |
| Amortization of intangible asset | 0.9 | | 1.4 | 2.0 | 1.0 | | 1.0 | 0.3 |
| Change in acquisition related contingency (Note 10) | -4.1 | | | | | | | |
| Amortization of discount on available-for-sale investments | 0.1 | | 0.1 | 0.2 | 0.1 | | | |
| Unrealized loss on foreign currency remeasurement adjustments | 0.0 | | | | | | | |
| Excess tax benefit from stock-based compensation | -0.1 | -0.1 | 0.0 | 0.0 | 0.0 | | | |
| |
| Changes in assets and liabilities | | | | | | | | |
| Accounts receivable | -6.7 | -10.5 | 2.6 | -15.0 | 2.1 | -4.4 | -5.0 | -1.7 |
| Inventories | -0.9 | -1.4 | -1.1 | 0.5 | 0.7 | | 0.6 | -1.1 |
| Prepaid expenses and other assets | -0.8 | -1.7 | -0.7 | 0.5 | 0.3 | -0.8 | -0.6 | 0.3 |
| Accounts payable | 4.8 | -1.9 | 0.8 | 0.3 | 0.7 | | -0.3 | -0.1 |
| Deferred revenue | 0.0 | | 0.2 | | 0.2 | | | |
| Accrued liabilities and other | 7.4 | | -6.1 | 14.6 | -0.4 | | 2.7 | 2.1 |
| Deferred rent | 0.0 | | 0.0 | 0.3 | 0.2 | | | |
| Net cash provided by operating activities | 5.6 | | -0.4 | 23.5 | 7.0 | -1.2 | 0.2 | -13.0 |
| |
| Cash flows from investing activities | | | | | | | | |
| Acquisition of property and equipment | -0.1 | -0.7 | -0.1 | -0.3 | 0.0 | -1.1 | -0.2 | -0.4 |
| Purchase of available-for-sale investments | -34.4 | -16.3 | -7.5 | -3.8 | -1.4 | -43.9 | | |
| Maturity of available-for-sale investments | 13.3 | | 9.4 | 4.0 | 0.5 | | | |
| Net cash used in investing activities | -21.2 | -15.0 | 1.8 | -15.6 | -1.0 | -34.1 | -0.2 | 10.5 |
| |
| Cash flows from financing activities | | | | | | | | |
| Proceeds from issuance of common stock from stock option exercises | 1.6 | | 1.1 | 1.2 | 0.9 | | 0.2 | 0.3 |
| Income tax benefit on exercise of stock options | 0.1 | | 0.0 | 0.0 | 0.0 | | | |
| Principal payments under notes payable | | -8.2 | -5.4 | -2.8 | -1.4 | -4.3 | -1.3 | -1.7 |
| Net cash provided by (used in) financing activities | 1.7 | | 13.7 | -1.5 | -0.4 | | -1.3 | 62.3 |
| |
| Net increase (decrease) in cash and cash equivalents | -13.9 | | 15.1 | 6.4 | 5.6 | | -1.2 | 59.9 |
| Cash and cash equivalents, beginning of period | 102.8 | | | 74.2 | 74.2 | | | 49.9 |
| Cash and cash equivalents, end of period | 88.9 | | 15.1 | 80.6 | 79.8 | | -1.2 | 109.7 |
| |
| Supplemental cash flow information | | | | | | | | |
| Cash paid for interest | 0.2 | | 1.0 | 0.3 | 0.2 | | 0.2 | 0.5 |
| Cash paid for income tax | 1.1 | | | | | | | |
| Stock-based compensation capitalized into inventories | 0.0 | | 0.0 | 0.0 | 0.0 | | 0.0 | 0.0 |
| |
| Supplemental disclosure of noncash investing and financing activities | | | | | | | | |
| Unrealized gain on available-for-sale investments | 0.0 | | | | 0.0 | | | |
| Deferred gain (Note 4) | 2.6 | | | | | | | |