| Net loss | -57.28M |
| Depreciation and amortization | 690K |
| Noncash stock based compensation | 8.3M |
| Noncash interest expense | |
| (Gain) loss on disposal of equipment | 8K |
| Amortization of premium on marketable securities | 924K |
| Accounts receivable | |
| Prepaid expenses and other assets | -15K |
| Accounts payable | 1.1M |
| Accrued expenses | -2.35M |
| Net cash used in operating activities | |
| Purchases of fixed assets | -1.77M |
| Purchases of marketable securities | -404.03M |
| Maturities of marketable securities | |
| Net cash provided by (used in) by investing activities | |
| Proceeds from sale of common stock, net of issuance costs | |
| Proceeds from exercise of stock options | 71K |
| Proceeds from sale of common stock under Employee Stock Purchase Plan | 126K |
| Payment of deferred financing costs | |
| Borrowings of debt | 0 |
| Repayments of debt | |
| Net cash provided by financing activities | |
| Net increase in cash and cash equivalents | -41.36M |
| Cash and cash equivalents, beginning of period | 81.73M |
| Cash and cash equivalents, end of period | 40.36M |
| Cash paid for interest | 33K |