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v3.22.1

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Cash flows from operating activities: |  |
Net loss | $ (1,967) | $ (1,655)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization expense | 794 | 661
Amortization of right-of-use assets | 154 | 149
Share-based compensation expense | 36 | 31
Change of inventory to net realizable value | 0 | 375
Changes in operating assets and liabilities: |  |
Receivables | (86) | 264
Inventories | 525 | 736
Prepaid expenses and other assets | 651 | 265
Accounts payable | (1,263) | (1,043)
Accrued liabilities | 286 | 446
Income taxes receivable | (5) | (43)
Deferred product revenue | (8) | (45)
Operating lease liabilities | (160) | (154)
Net cash used in operating activities | (1,043) | (13)
Cash flows from investing activities: |  |
Purchase of property and equipment | (8) | (7)
Purchase of intangibles | (70) | (71)
Capitalized patent defense costs | (189) | (1,678)
Proceeds from maturities and sales of marketable securities | 2,042 | 413
Purchases of marketable securities | 0 | (310)
Net cash provided by (used in) investing activities | 1,775 | (1,653)
Cash flows from financing activities: |  |
Net proceeds from equity-based compensation programs | 2 | 4
Principal payments of long-term debt | (370) | (90)
Net cash provided by financing activities | (368) | (86)
Effect of exchange rate changes on cash and cash equivalents | (13) | (17)
Net increase in cash and cash equivalents | 351 | (1,769)
Cash and cash equivalents at the beginning of the period | 1,071 | 3,803
Cash and cash equivalents at the end of the period | 1,422 | 2,034
Supplemental cash flow activities: |  |
Cash paid for income taxes | 26 | 43
Cash paid for interest | $ 51 | $ 50

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