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CONSOLIDATED BALANCE SHEETS (Unaudited Consolidated Condensed) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Current assets:    
Cash $ 962 $ 1,345
Trade accounts receivable, less allowance for doubtful accounts of $9 on September 30, 2019 and December 31, 2018, respectively 1,373 829
Inventories, net 2,144 2,242
Prepaid expenses and other current assets 285 273
Total current assets 4,764 4,689
Equipment and leasehold improvements, net 2,164 1,865
Operating lease right-of-use assets 2,198  
Other assets, net 13 15
Total assets 9,139 6,569
Current liabilities:    
Line of credit, related party 1,103 832
Line of credit, bank 500  
Current portion of finance lease obligations 228 218
Current portion of operating lease obligations 361  
Accounts payable 994 1,608
Accrued expenses 960 979
Deferred revenue 469  
Total current liabilities 4,615 3,637
Long-term portion of finance lease obligations 334 506
Long-term portion of operating lease obligations 2,128  
Long-term loan, related party 500 500
Long-term deferred rent 344
Long-term deferred revenue 125  
Asset retirement obligations 204 198
Total long-term liabilities 3,291 1,548
Stockholders' equity:    
Preferred stock, $.01 par value, 24,088 shares authorized, and no shares issued and outstanding 0 0
Common stock, $.01 par value, 42,000,000 shares authorized; 38,136,792 and 33,911,792 shares issued and outstanding on September 30, 2019 and December 31, 2018 respectively 381 339
Additional paid-in capital 100,624 98,795
Accumulated deficit (99,772) (97,750)
Total stockholders' equity 1,233 1,384
Total liabilities and stockholders' equity $ 9,139 $ 6,569