CONSOLIDATED BALANCE SHEETS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 632	$ 1,345
Tradeaccounts receivable, less allowance for doubtful accounts of $9 on March 31, 2019 and December 31, 2018, respectively	2,105	829
Inventories, net	2,228	2,242
Prepaid expenses and other current assets	409	273
Total current assets	5,374	4,689
Equipment and leasehold improvements, net	2,055	1,865
Operating lease right-of-use assets	2,122
Other assets, net	14	15
Total assets	9,565	6,569
Current liabilities:
Line of credit, related party	1,448	832
Line of credit, bank	500
Current portion of finance lease obligations	223	218
Current portion of operating lease obligations	331
Accounts payable	1,781	1,608
Accrued expenses	1,088	979
Total current liabilities	5,371	3,637
Long-term portion of finance lease obligations	449	506
Long-term portion of operating lease obligations	2,117
Long-term loan, related party	500	500
Long-term deferred rent		344
Asset retirement obligations	200	198
Total long-term liabilities	3,266	1,548
Contingent liabilities:
Stockholders' equity:
Preferred stock, $.01 par value, 24,088 shares authorized, and no shares issued and outstanding
Common stock, $.01 par value, 42,000,000 shares authorized; 33,911,792 shares issued and outstanding on March 31, 2019 and December 31, 2018, respectively	339	339
Additional paid-in capital	98,852	98,795
Accumulated deficit	(98,263)	(97,750)
Total stockholders' equity	928	1,384
Total liabilities and stockholders' equity	$ 9,565	$ 6,569