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Condensed Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating Activities:    
Net loss $ (3,831) $ (2,278)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 332 187
Common stock issued for services 76 107
Change in fair value of contingent consideration liabilities (13) 0
Employee stock-based compensation 438 94
Amortization of operating lease right of use asset 0 6
Other 14 0
(Increase) decrease in:    
Accounts receivable (2,453) 1,193
Prepaid expenses and other current assets 390 (1,546)
Inventory (414) (632)
Increase in:    
Accounts payable 4,235 492
Accrued expenses 932 386
Sales tax payable (20) 10
Deferred revenue (305) 74
Net cash used in operating activities (619) (1,907)
Investing Activities:    
Working capital payment for acquisition 0 (811)
Purchase of property and equipment (314) (131)
Funding of patent costs (16) (12)
Net cash used in investing activities (330) (954)
Financing Activities:    
Proceeds from sale of stock under committed equity facility, net of offering costs 158 0
Proceeds from warrant exercises 100 88
Net cash provided by financing activities 258 88
Net decrease in cash (691) (2,773)
Cash at beginning of period 1,681 21,949
Cash at end of period 990 19,176
Supplemental Disclosure of Non-Cash Investing and Financing Activities:    
Fair value of common stock issued as consideration for business combination 0 14,359
Purchase of property and equipment by incurring current liabilities 21 0
Depreciation cost capitalized into inventory 85 15
Right-of-use assets obtained in exchange for lease liabilities 0 192
Warrants issued for services to non-employee 1,609 0
Shares issued for services to non-employee $ 95 $ 0