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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Operating activities:    
Net loss $ (2,266) $ (3,377)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 59 20
Amortization of intangible assets 182 0
Vesting of employee restricted stock awards   (2)
Issuance of warrants to non-employees for services   13
Unrealized gain on changes in fair value of warrant liability (2,056)  
Decrease in fair value of contingent liability (219)  
Changes in operating assets and liabilities:    
Accounts receivable 570 (126)
Inventory (581) (74)
Prepaid expenses and other current assets 149 12
Operating lease right-of-use assets (1,806) 174
Other assets   (1)
Accounts payable and accrued liabilities 50 (326)
Operating lease liabilities 1,824 (200)
Deferred revenue   2
Net cash used in operating activities (3,756) (3,406)
Investing activities:    
Purchases of property and equipment (32) (27)
Net cash used in investing activities (32) (27)
Financing activities:    
Proceeds from common stock issuances, net   1,775
Payment on the line of credit (105)  
Net cash (used in) provided by financing activities (105) 1,775
Net decrease in cash, cash equivalents, and restricted cash (3,893) (1,658)
Cash, cash equivalents and restricted cash, beginning of year 7,979 12,427
Cash, cash equivalents and restricted cash, end of period 4,086 10,769
Supplemental disclosure of cash flow information:    
Interest paid 7  
Addition of operating lease, right-of-use asset 2,039  
Conversion of Series B Non-Voting Preferred Stock to common stock 110  
Employees and Directors [Member] | Share-Based Payment Arrangement, Option [Member]    
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense for options and stock issued 338 372
Nonemployees [Member] | Share-Based Payment Arrangement, Option [Member]    
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense for options and stock issued   $ 107
The 2019 Preferred Warrant and 2019 Common Warrant Liability [Member]    
Supplemental disclosure of cash flow information:    
Warrant liability transferred to equity $ 7,502