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v3.20.2

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Cash flows from operating activities: |  |
Net loss | $ (3,784) | $ (4,447)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation and amortization expense | 1,082 | 964
Amortization of right-of-use assets | 273 | 282
Stock-based compensation expense | 54 | 129
Provision for doubtful accounts, net | 31 | 40
Change of inventory to net realizable value | 660 | 368
Changes in operating assets and liabilities: |  |
Receivables | (358) | 251
Inventories | 2,331 | 1,840
Prepaid expenses and other assets | 238 | 584
Accounts payable | 302 | (1,750)
Accrued liabilities | (443) | 255
Income taxes payable | 6 | 411
Deferred product revenue | 26 | (44)
Operating lease liabilities | (276) | (281)
Other long-term liabilities | (29) |
Net cash provided by (used in) operating activities | 113 | (1,398)
Cash flows from investing activities: |  |
Purchase of property and equipment | (218) | (72)
Purchase of intangibles | (114) | (24)
Capitalized patent defense costs | (3,792) | (2,298)
Proceeds from maturities and sales of marketable securities | 2,482 | 2,011
Purchases of marketable securities | (1,903) | (7,088)
Net cash used in investing activities | (3,545) | (7,471)
Cash flows from financing activities: |  |
Net proceeds from Paycheck Protection Program loan | 1,499 |
Net proceeds from equity-based compensation programs | 6 | 16
Net cash provided by financing activities | 1,505 | 16
Effect of exchange rate changes on cash and cash equivalents | (31) | (6)
Net decrease in cash and cash equivalents | (1,958) | (8,859)
Cash and cash equivalents at the beginning of the period | 4,064 | 11,211
Cash and cash equivalents at the end of the period | 2,106 | 2,352
Supplemental cash flow activities: |  |
Cash paid for income taxes | 12 | 11
Interest paid | $ 134 |

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