Balance Sheets (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 2,665,648	$ 2,693,623
Investments	30,000	30,000
Trade accounts receivable, less allowance for doubtful accounts of $6,000 on June 30, 2012 and December 31, 2011	1,206,255	878,600
Other receivables	9,122	13,712
Inventories, net	1,039,094	1,338,210
Prepaid expenses and other current assets	426,449	391,466
Total current assets	5,376,568	5,345,611
Equipment and leasehold improvements, net	3,382,135	3,713,082
Other assets, net	31,078	32,318
Total assets	8,789,781	9,091,011
Current liabilities:
Current portion of capital lease obligations	33,405
Deferred other revenue	135,999
Accounts payable	726,074	319,706
Accrued expenses	465,479	383,425
Accrued discount liability	74,199	116,103
Total current liabilities	1,435,156	819,234
Long-term portion of capital lease obligations	80,303
Long-term deferred rent	636,945	647,404
Asset retirement obligations	151,174	148,515
Total long-term liabilities	868,422	795,919
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; 21,208,162 shares issued and outstanding on June 30, 2012 and December 31, 2011	212,082	212,082
Additional paid-in capital	93,233,880	93,070,979
Accumulated deficit	(86,959,759)	(85,807,203)
Total stockholders' equity	6,486,203	7,475,858
Total liabilities and stockholders' equity	$ 8,789,781	$ 9,091,011