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CONSOLIDATED BALANCE SHEETS (Unaudited Consolidated Condensed) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Current assets:    
Cash $ 1,015 $ 1,345
Trade accounts receivable, less allowance for doubtful accounts of $9 on June 30, 2019 and December 31, 2018, respectively 1,652 829
Inventories, net 2,093 2,242
Prepaid expenses and other current assets 351 273
Total current assets 5,111 4,689
Equipment and leasehold improvements, net 2,127 1,865
Operating lease right-of-use assets 2,059  
Other assets, net 14 15
Total assets 9,311 6,569
Current liabilities:    
Line of credit, related party 1,246 832
Current portion of finance lease obligations 227 218
Current portion of operating lease obligations 329  
Accounts payable 1,423 1,608
Accrued expenses 925 979
Total current liabilities 4,150 3,637
Long-term portion of finance lease obligations 390 506
Long-term portion of operating lease obligations 2,038  
Long-term loan, related party 500 500
Long-term deferred rent   344
Asset retirement obligations 202 198
Total long-term liabilities 3,130 1,548
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; 38,100,792 shares issued and outstanding on June 30, 2019 and 33,911,792 December 31, 2018 381 339
Additional paid-in capital 100,560 98,795
Accumulated deficit (98,910) (97,750)
Total stockholders' equity 2,031 1,384
Total liabilities and stockholders' equity $ 9,311 $ 6,569