| Net loss | |
| Depreciation and amortization | 2.58M |
| Issuance of treasury stock | |
| Provision for losses on doubtful receivables | |
| Stock-based compensation expense | 708.1K |
| Losses (gains) on sale of property, plant and equipment, net | -75.57K |
| Changes in operating assets and liabilities | -5.09M |
| Net cash used in operating activities | |
| Additions to property, plant and equipment | -2.43M |
| Proceeds from sale of property, plant and equipment | 113.8K |
| Purchases of investments | -67.3K |
| Proceeds from sales of investments | 23K |
| Decrease (increase) in other assets | |
| Net cash used in investing activities | |
| Proceeds from revolving line of credit and long-term debt | 0 |
| Repayments of revolving line of credit and long-term debt | -500K |
| Proceeds from exercise of stock options | 70.83K |
| Net cash provided by financing activities | |
| Change in cash and cash equivalents | 5.78M |
| Cash and cash equivalents, beginning of period | 17.25M |
| Cash and cash equivalents, end of period | 23.03M |