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v3.21.2

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Cash flows from operating activities: |  |
Net loss | $ (3,241) | $ (3,784)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation and amortization expense | 1,330 | 1,082
Amortization of right-of-use assets | 291 | 273
Stock-based compensation expense | 65 | 54
Provision for doubtful accounts, net |  | 31
Change of inventory to net realizable value | 682 | 660
Changes in operating assets and liabilities: |  |
Receivables | (111) | (358)
Inventories | 1,189 | 2,331
Prepaid expenses and other assets | 261 | 238
Accounts payable | 96 | 302
Accrued liabilities | 842 | (443)
Income taxes payable | (51) | 6
Deferred product revenue | (67) | 26
Operating lease liabilities | (301) | (276)
Other long-term liabilities |  | (29)
Net cash provided by (used in) operating activities | 985 | 113
Cash flows from investing activities: |  |
Purchase of property and equipment | (25) | (218)
Purchase of intangibles | (147) | (114)
Capitalized patent defense costs | (3,206) | (3,792)
Proceeds from maturities and sales of marketable securities | 1,394 | 2,482
Purchases of marketable securities | (517) | (1,903)
Net cash used in investing activities | (2,501) | (3,545)
Cash flows from financing activities: |  |
Net proceeds from Paycheck Protection Program loan |  | 1,499
Net proceeds from equity-based compensation programs | 7 | 6
Principal payments of long-term debt | (180) |
Net cash provided by (used in) financing activities | (173) | 1,505
Effect of exchange rate changes on cash and cash equivalents | (26) | (31)
Net decrease in cash and cash equivalents | (1,715) | (1,958)
Cash and cash equivalents at the beginning of the period | 3,803 | 4,064
Cash and cash equivalents at the end of the period | 2,088 | 2,106
Supplemental cash flow activities: |  |
Cash paid for income taxes | 74 | 12
Cash paid for interest | $ 106 | $ 134

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