| 2013 | 2012 | |
| Reconciliation of net operating loss to net cash from operating activities | ||
| Operating loss | $(31,367,576) | $(32,902,061) |
| Adjustments to reconcile operating loss to net cash from operating activities: | ||
| Depreciation expense | 4,511,068 | 4,485,779 |
| Bad debt expense | 1,637,173 | 3,146,807 |
| Changes in assets and liabilities: | ||
| Receivables, net | (39,795) | (8,151,253) |
| Inventory and other current assets | (307,373) | 132,778 |
| Accounts payable and accrued liabilities | (990,898) | 1,550,274 |
| Accrued compensation and expenses | (96,819) | (400,649) |
| Other liabilities | (58,900) | (38,914) |
| Unearned revenue | (931,256) | 65,327 |
| Net cash from operating activities | $(27,644,376) | $(32,111,912) |