Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 2,018	$ 3,276
Investments		30
Trade accounts receivable, less allowance for doubtful accounts of $6 on September 30, 2014 and December 31, 2013	1,326	52
Other receivables		1
Inventories, net	749	976
Prepaid expenses and other current assets	244	202
Total current assets	4,337	4,537
Equipment and leasehold improvements, net	2,267	2,464
Other assets, net	25	27
Total assets	6,629	7,028
Current liabilities:
Current portion of capital lease obligations	18	31
Accounts payable	589	503
Accrued expenses	559	323
Total current liabilities	1,166	857
Long-term portion of capital lease obligations		10
Long-term deferred rent	624	633
Asset retirement obligations	165	160
Total long-term liabilities	789	803
Stockholders' equity:
Preferred stock, $.01 par value, 24,088 shares authorized and no shares issued and outstanding	0	0
Common stock, $.01 par value, 35,000,000 shares authorized; 28,481,496 shares issued and outstanding on September 30, 2014 and December 31, 2013	285	285
Additional paid-in capital	95,916	95,761
Accumulated deficit	(91,527)	(90,678)
Total stockholders' equity	4,674	5,368
Total liabilities and stockholders' equity	$ 6,629	$ 7,028