| Net income (loss) | -8.78M |
| Compensation expense related to issuance of stock options | |
| Depreciation expense | 263.13K |
| Amortization of patent costs | 48.05K |
| Deferred income tax | |
| Interest added to notes receivable | |
| Royalty receivable | |
| Prepaid expenses and other | -260.79K |
| Income tax payable | |
| Accounts payable | |
| Accrued expenses | |
| Net cash provided by (used in) operating activities | |
| Net redemption of certificates of deposit | |
| Increase in notes receivable | |
| Purchase of office equipment | |
| Investment in patents | -157.49K |
| Net cash provided by (used in) investing activities | |
| Payments of dividend | |
| Stock option exercised | 645.86K |
| Net cash used in financing activities | |
| Net increase (decrease) in cash and cash equivalents | -9.91M |
| Cash and cash equivalents - beginning of period | 25.91M |
| Cash and cash equivalents - end of period | 16M |