Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Cash Flows (Unaudited)

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Condensed Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (5,495) $ (7,236)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 186 455
Stock-based compensation 165 1,169
Loss (gain) on sales and disposals of property and equipment 36 (501)
Changes in operating assets and liabilities:    
Accounts receivable (5) 78
Inventories (73) (14)
Prepaid expenses and other assets (240) (83)
Accounts payable (256) 406
Accrued expenses (2,822) (2,172)
Deferred revenue   (93)
Other liabilities (65) (87)
Net cash used in operating activities (8,569) (8,078)
CASH FLOWS FROM INVESTING ACTIVITIES    
Proceeds from sales of property and equipment   309
Purchases of property and equipment   (20)
Net cash provided by investing activities   289
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from issuance of common stock and warrants 12,670 300
Payments of offering costs related to the issuance of common stock and warrants (1,519) (198)
Proceeds from exercise of warrants 25  
Payments on equipment financing   (265)
Net cash provided by (used in) financing activities 11,176 (163)
NET CHANGE IN CASH AND CASH EQUIVALENTS 2,607 (7,952)
CASH AND CASH EQUIVALENTS, beginning of period 15,045 23,906
CASH AND CASH EQUIVALENTS, end of period 17,652 15,954
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:    
Unpaid offering costs $ 1,411 37
Receivable from sale of property and equipment   $ 222