| Net loss | |
| Stock-based compensation | 2.65M |
| Tax benefit from stock-based compensation | |
| Excess tax benefit related to stock-based compensation | |
| Depreciation and amortization | 733K |
| Provision for excess and obsolete inventories | |
| Provision for doubtful accounts receivable | |
| Change in deferred tax asset net of valuation allowance | |
| Gain on sale of marketable investments, net | |
| Tax benefit on unrealized gains on marketable and long term investments | |
| Accounts receivable | -61K |
| Inventories | -4.4M |
| Other current assets and prepaid expenses | -690K |
| Accounts payable | 1.32M |
| Accrued liabilities | 886K |
| Deferred rent | |
| Deferred revenue | -1.19M |
| Income tax liability | -18K |
| Net cash used in operating activities | |
| Acquisition of property and equipment | -311K |
| Proceeds from sales of marketable investments | 6.15M |
| Proceeds from maturities of marketable investments | 20.14M |
| Purchase of marketable investments | -23.94M |
| Net cash provided by investing activities | |
| Proceeds from exercise of stock options and employee stock purchase plan | 6.2M |
| Excess tax benefit related to stock-based compensation | |
| Net cash provided by financing activities | |
| Net increase in cash and cash equivalents | 407K |
| Cash and cash equivalents at end of period | |
| Cash and cash equivalents at beginning of period | |