Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 1,156	$ 1,862
Trade accounts receivable, less allowance for doubtful accounts of $6 on June 30, 2015 and December 31, 2014	1,588	388
Inventories, net	535	950
Prepaid expenses and other current assets	288	367
Total current assets	3,567	3,567
Equipment and leasehold improvements, net	2,025	2,138
Other assets, net	24	25
Total assets	5,616	5,730
Current liabilities:
Current portion of capital lease obligations	81	70
Line of credit	250
Accounts payable	685	493
Accrued expenses	459	413
Total current liabilities	1,475	976
Long-term portion of capital lease obligations	134	121
Long-term deferred rent	570	621
Asset retirement obligations	169	166
Total long-term liabilities	$ 873	$ 908
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; 28,585,496 and 28,516,163 shares issued and outstanding on June 30, 2015 and December 31, 2014, respectively	$ 286	$ 285
Additional paid-in capital	96,086	95,966
Accumulated deficit	(93,104)	(92,405)
Total stockholders' equity	3,268	3,846
Total liabilities and stockholders' equity	$ 5,616	$ 5,730