| Cash and cash equivalents | |
| Accounts receivable, net | |
| Inventories, net | |
| Prepaid expenses | |
| Total current assets | |
| Property, plant and equipment, net | |
| Patents, net | |
| Total assets | |
| Accounts payable | |
| Accrued liabilities | |
| Total current liabilities | |
| Deferred rent | |
| Total liabilities | |
| Commitments and contingencies | |
| Preferred stock, $0.01 par value: 5,000,000 shares authorized, no shares issued | |
| Common stock, $0.01 par value: 100,000,000 shares authorized 44,497,074 issued and outstanding at January 31, 2012, and 40,034,659 issued and outstanding at July 31, 2011 | |
| Additional paid-in capital | |
| Accumulated deficit | |
| Total stockholders' equity | |
| Total liabilities and stockholders' equity |