Consolidated Balance Sheets (USD $) | Sep. 30, 2013 | Jun. 30, 2013 |
Current assets: | ' | ' |
Cash and cash equivalents | $5,284,163 | $2,899,927 |
Accounts receivable, net of allowance for doubtful accounts of $47,597 and $52,598, respectively | 962,256 | 923,780 |
Inventory | 436,244 | 405,571 |
Other receivables | 9,293 | 11,502 |
Prepaid expenses and other current assets | 210,404 | 202,880 |
Total current assets | 6,902,360 | 4,443,660 |
Fixed assets, net of accumulated depreciation | 1,510,009 | 1,684,282 |
Restricted cash | 181,167 | 181,149 |
Inventory, non-current | 469,758 | 469,758 |
Other assets, net of accumulated amortization | 271,394 | 276,507 |
Total assets | 9,334,688 | 7,055,356 |
Current liabilities: | ' | ' |
Accounts payable and accrued liabilities | 653,390 | 432,566 |
Accrued protocol expense | 8,306 | 25,305 |
Accrued radioactive waste disposal | 112,000 | 100,000 |
Accrued payroll and related taxes | 84,933 | 127,419 |
Accrued vacation | 111,276 | 107,578 |
Total current liabilities | 969,905 | 792,868 |
Warrant derivative liability | 140,000 | 104,000 |
Asset retirement obligation | 810,202 | 792,242 |
Total liabilities | 1,920,107 | 1,689,110 |
Commitments and contingencies (Note 6) | ' | ' |
Shareholders' equity: | ' | ' |
Preferred stock, $.001 par value; 7,001,671 shares authorized: | 61 | 59 |
Common stock, $.001 par value; 192,998,329 and 193,000,000 shares authorized; 38,419,502 and 34,618,517 shares issued and outstanding | 38,420 | 34,618 |
Treasury stock, at cost 13,200 shares | -8,390 | -8,390 |
Additional paid-in capital | 60,746,730 | 57,431,293 |
Accumulated deficit | -53,362,240 | -52,091,334 |
Total shareholders' equity | 7,414,581 | 5,366,246 |
Total liabilities and shareholders' equity | 9,334,688 | 7,055,356 |
Series A Preferred Stock [Member] | ' | ' |
Shareholders' equity: | ' | ' |
Preferred stock, $.001 par value; 7,001,671 shares authorized: | ' | ' |
Series B Preferred Stock [Member] | ' | ' |
Shareholders' equity: | ' | ' |
Preferred stock, $.001 par value; 7,001,671 shares authorized: | 59 | 59 |
Series C Preferred Stock [Member] | ' | ' |
Shareholders' equity: | ' | ' |
Preferred stock, $.001 par value; 7,001,671 shares authorized: | ' | ' |
Series D Preferred Stock [Member] | ' | ' |
Shareholders' equity: | ' | ' |
Preferred stock, $.001 par value; 7,001,671 shares authorized: | $2 | ' |