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Balance Sheets (USD $)
Dec. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 4,124,234 $ 2,693,623
Investments 30,000 30,000
Trade accounts receivable, less allowance for doubtful accounts of $6,000 on December 31, 2012 and 2011 1,031,405 878,600
Other receivables 27,167 13,712
Inventories, net 1,138,482 1,338,210
Prepaid expenses and other current assets 240,870 391,466
Total current assets 6,592,158 5,345,611
Equipment and leasehold improvements, net 3,027,671 3,713,082
Other assets, net 29,829 32,318
Total assets 9,649,658 9,091,011
Current liabilities:    
Current portion of capital lease obligations 34,526  
Accounts payable 680,452 319,706
Accrued expenses 484,460 383,425
Accrued discount liability   116,103
Total current liabilities 1,199,438 819,234
Long-term portion of capital lease obligations 62,755  
Long-term deferred rent 636,628 647,404
Asset retirement obligations 153,967 148,515
Total long-term liabilities 853,350 795,919
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; 28,458,162 and 21,208,162 shares issued and outstanding on December 31, 2012 and December 31, 2011, respectively 284,582 212,082
Additional paid-in capital 95,512,065 93,070,979
Accumulated deficit (88,199,777) (85,807,203)
Total stockholders' equity 7,596,870 7,475,858
Total liabilities and stockholders' equity $ 9,649,658 $ 9,091,011