Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Cash Flows

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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Operating activities:    
Net loss $ (3,670) $ (2,534)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation and amortization 126 164
Changes in allowance for doubtful accounts 31 0
Gain on revaluation of warrant liabilities (11) (2,519)
Stock-based compensation expense 356 587
Amortization of debt discount and accretion of final payment fee 1 13
Common stock contribution to 401(k) plan 52 77
Unrealized loss on foreign currency transactions 503 219
Changes in operating assets and liabilities:    
Accounts receivable 917 2,550
Inventories (228) (32)
Prepaid expenses, operating lease right-of-use assets, and other assets current and noncurrent (78) (68)
Accounts payable 151 96
Accrued and lease liabilities 15 37
Deferred revenues (165) (312)
Net cash used in operating activities (2,000) (1,722)
Financing activities:    
Proceeds from issuance of common stock and warrants, net 37,295 0
Principal payments on note payable 0 (589)
Proceeds from exercise of warrants 1,417 0
Net cash provided by (used in) financing activities 38,712 (589)
Effect of exchange rate changes on cash (35) (45)
Net increase (decrease) in cash 36,677 (2,356)
Cash at beginning of period 12,862 10,872
Cash at end of period 49,539 8,516
Supplemental disclosure of cash flow activities    
Cash paid for interest 23 32
Cash paid for income taxes 0 3
Supplemental disclosure of non-cash activities    
Fair value of warrants issued upon equity financing 1,936 0
Reclassification of warrant liability to equity upon exercise of warrants 2,461 0
Transfer of inventory to property and equipment 53 38
Share issuance for common stock contribution to 401(k) plan 152 155
Share issuance in lieu of cash compensation $ 0 $ 50