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CONSOLIDATED BALANCE SHEETS (Unaudited Consolidated Condensed) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Current assets:    
Cash $ 951 $ 1,194
Trade accounts receivable, less allowance for doubtful accounts of $9 on March 31, 2020 and December 31, 2019, respectively 2,254 970
Inventories, net 2,384 2,554
Prepaid expenses and other current assets 259 267
Total current assets 5,848 4,985
Equipment and leasehold improvements, net 2,351 2,255
Operating leases, right of use 2,037 2,119
Other assets, net 12 13
Total assets 10,248 9,372
Current liabilities:    
Line of credit, bank 500 500
Line of credit, related party 1,400 224
Current portion of long-term debt, related party 500 500
Current portion of finance lease obligations 207 218
Current portion of operating lease obligations 369 357
Accounts payable 1,713 1,748
Current portion of deferred revenue 321 482
Accrued expenses 512 380
Total current liabilities 5,522 4,409
Long-term portion of finance lease obligations 241 288
Long-term portion of operating lease obligations 1,937 2,035
Long-term convertible loan, related party 897 830
Long-term portion of deferred revenue 47 93
Asset retirement obligations 208 206
Total long-term liabilities 3,330 3,452
Contingent liabilities  
Shareholders' equity:    
Preferred stock, $.01 par value, 24,088 shares authorized, and no shares issued and outstanding  
Common stock, $.01 par value, 55,000,000 shares authorized; 38,136,792 and 33,911,792 shares issued and outstanding on March 31, 2020 and December 31, 2019, respectively 381 381
Additional paid-in capital 101,938 101,886
Accumulated deficit (100,923) (100,756)
Total Shareholders' equity 1,396 1,511
Total liabilities and stockholders' equity $ 10,248 $ 9,372