Balance Sheets (USD $)	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 3,465,507	$ 5,744,322
Investments	30,000	30,000
Trade accounts receivable, less allowance for doubtful accounts of $6,000 on June 30, 2011 and $3,000 on December 31, 2010, respectively	1,539,341	765,250
Other receivables	77,602	14,260
Inventories, net	1,918,197	1,825,882
Prepaid expenses and other current assets	501,351	346,926
Total current assets	7,531,998	8,726,640
Equipment and leasehold improvements, net	4,233,921	4,721,672
Other assets, net	33,565	34,799
Total assets	11,799,484	13,483,111
LIABILITIES AND STOCKHOLDERS' EQUITY
Current portion of capital lease obligations		748
Accounts payable	644,985	918,527
Accrued expenses	589,756	1,047,509
Accrued discount liability	215,460	296,235
Total current liabilities	1,450,201	2,263,019
Long-term deferred rent	641,464	635,523
Asset retirement obligations	144,901	141,407
Total long-term liabilities	786,365	776,930
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; 21,204,162 shares issued and outstanding on June 30, 2011 and December 31, 2010	212,042	212,042
Additional paid-in capital	92,877,849	92,674,786
Accumulated deficit	(83,526,973)	(82,443,666)
Total stockholders' equity	9,562,918	10,443,162
Total liabilities and stockholders' equity	$ 11,799,484	$ 13,483,111