Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 1,249	$ 1,862
Trade accounts receivable, less allowance for doubtful accounts of $6 on September 30, 2015 and December 31, 2014	1,478	388
Inventories, net	643	950
Prepaid expenses and other current assets	251	367
Total current assets	3,621	3,567
Equipment and leasehold improvements, net	1,916	2,138
Other assets, net	23	25
Total assets	5,560	5,730
Current liabilities:
Short term debt	200
Current portion of capital lease obligations	82	70
Accounts payable	815	493
Accrued expenses	477	413
Total current liabilities	1,574	976
Long-term portion of capital lease obligations	113	121
Long-term deferred rent	544	621
Asset retirement obligations	171	166
Total long-term liabilities	$ 828	$ 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 September 30, 2015 and December 31, 2014	$ 286	$ 285
Additional paid-in capital	96,131	95,966
Accumulated deficit	(93,259)	(92,405)
Total stockholders' equity	3,158	3,846
Total liabilities and stockholders' equity	$ 5,560	$ 5,730