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Balance Sheets (USD $)
Sep. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 4,565,558 $ 2,693,623
Investments 30,000 30,000
Trade accounts receivable, less allowance for doubtful accounts of $6,000 on September 30, 2012 and December 31, 2011 869,660 878,600
Other receivables   13,712
Inventories, net 1,291,989 1,338,210
Prepaid expenses and other current assets 268,346 391,466
Total current assets 7,025,553 5,345,611
Equipment and leasehold improvements, net 3,218,327 3,713,082
Other assets, net 30,453 32,318
Total assets 10,274,333 9,091,011
Current liabilities:    
Current portion of capital lease obligations 33,961  
Deferred other revenue 67,998  
Accounts payable 605,474 319,706
Accrued expenses 561,235 383,425
Accrued discount liability 34,888 116,103
Total current liabilities 1,303,556 819,234
Long-term portion of capital lease obligations 71,602  
Long-term deferred rent 636,122 647,404
Asset retirement obligations 152,554 148,515
Total long-term liabilities 860,278 795,919
Contingent liabilities      
Stockholders' equity:    
Preferred stock, $.01 par value, 24,088 shares authorized and no shares issued and outstanding      
Common stock, $.01 par value, 35,000,000 shares authorized; and 28,458,162 and 21,208,162 shares issued and outstanding on September 30, 2012 and December 31, 2011, respectively 284,582 212,082
Additional paid-in capital 95,444,015 93,070,979
Accumulated deficit (87,618,098) (85,807,203)
Total stockholders' equity 8,110,499 7,475,858
Total liabilities and stockholders' equity $ 10,274,333 $ 9,091,011