| Net loss | |
| Depreciation and amortization | 77K |
| Amortization of premium/discount on marketable securities | |
| Amortization of deferred gain on sale leaseback | 0 |
| Non-cash stock compensation | 1.44M |
| Loss on auction rate securities put option | |
| Gain on auction rate securities | |
| Prepaid expenses and other current assets | 299K |
| Other long-term assets | |
| Accounts payable and accrued expenses | 1.06M |
| Deferred revenue | -3.44M |
| Net cash used in operating activities | |
| Purchases of marketable securities | -28.45M |
| Proceeds from sale or maturity of marketable securities | 30.55M |
| Purchases of property and equipment | -15K |
| Net cash provided by (used in) investing activities | |
| Payment of notes payable | |
| Proceeds from stock offering, net | |
| Proceeds from stock option exercises | 163K |
| Net cash provided by (used in) financing activities | |
| Net increase (decrease) in cash and cash equivalents | 1.02M |
| Cash and cash equivalents, beginning of period | 13.98M |
| Cash and cash equivalents, end of period | 15M |