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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:        
Net loss   $ (4,461) $ (5,437)  
Adjustments to reconcile net loss to net cash flows used in operating activities:        
Depreciation and amortization   549 564  
Amortization of operating lease right-of-use asset   107 110  
Amortization of finance lease right-of-use asset   22 27  
Amortization of deferred financing costs, debt discounts and debt premiums   2 317  
Gain on forgiveness of debt   (794)    
Gain on settlement of liability $ (17) (34)    
Loss on extinguishment of convertible notes     1,225  
Stock-based compensation   800 329  
Value of stock issued in payment of services   150    
Provision for losses on doubtful accounts   188 606  
Warrant revaluation   1,012 (564)  
Derecognition of finance lease right-of-use asset   29    
Gain from sale of fixed asset     (55)  
Changes in operating assets and liabilities:        
Accounts receivable   243 (1,386)  
Inventories   (206) (49)  
Finance lease right-of-use assets   (35)    
Other assets   9 195  
Accounts payable   81 147  
Operating lease liabilities   (110) (106)  
Accrued expenses and other liabilities   (600) 515  
Net cash used in operating activities   (3,048) (3,562)  
CASH FLOWS FROM INVESTING ACTIVITIES:        
Purchase of property and equipment   (321) (65)  
Proceeds from sale of fixed asset     55  
Net cash used in investing activities   (321) (10)  
CASH FLOWS FROM FINANCING ACTIVITIES:        
Principal payments on finance lease obligations   (37) (33)  
Issuance of common stock, net of issuance costs   16,207 2,607  
Proceeds from exercise of warrants   400    
Proceeds from PPP Loan     787 $ 800
Principal payments on long-term debt   (26) (284)  
Payments on common stock warrant liabilities   (130)    
Net cash flows provided by financing activities   16,414 3,077  
NET CHANGE IN CASH   13,045 (495)  
CASH AT BEGINNING OF PERIOD   2,656 848 848
CASH AT END OF PERIOD $ 15,701 15,701 353 $ 2,656
SUPPLEMENTAL CASH FLOW INFORMATION        
Cash paid during the period for interest   6 20  
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY        
Purchases of equipment financed through accounts payable   47    
Equipment financed through finance lease obligations     21  
Conversion of convertible debt, plus interest, into common stock     2,176  
Write-off of beneficial conversion feature in conjunction with convertible note extinguishment     523  
Finance lease right-of-use assets obtained in exchange for finance lease obligations   $ 321    
Write-off of (debt premiums) debt discounts, net, in conjunction with convertible note conversions     $ (270)