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v3.21.1

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities: |  |
Net loss | $ (1,655) | $ (1,847)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation and amortization expense | 661 | 522
Amortization of right-of-use assets | 149 | 143
Stock-based compensation expense | 31 | 37
Provision for doubtful accounts, net |  | 15
Change of inventory to net realizable value | 375 | 201
Changes in operating assets and liabilities: |  |
Receivables | 264 | 878
Inventories | 736 | 1,428
Prepaid expenses and other assets | 265 | 110
Accounts payable | (1,043) | (396)
Accrued liabilities | 446 | (458)
Income taxes payable | (43) | 10
Deferred product revenue | (45) | 34
Operating lease liabilities | (154) | (146)
Other long-term liabilities |  |
Net cash provided by (used in) operating activities | (13) | 531
Cash flows from investing activities: |  |
Purchase of property and equipment | (7) | (30)
Purchase of intangibles | (71) | (48)
Capitalized patent defense costs | (1,678) | (1,722)
Proceeds from maturities and sales of marketable securities | 413 | 1,208
Purchases of marketable securities | (310) | (1,124)
Net cash used in investing activities | (1,653) | (1,716)
Cash flows from financing activities: |  |
Net proceeds from equity-based compensation programs | 4 | 3
Principal payments of long-term debt | (90) |
Net cash provided by (used in) financing activities | (86) | 3
Effect of exchange rate changes on cash and cash equivalents | (17) | (27)
Net decrease in cash and cash equivalents | (1,769) | (1,209)
Cash and cash equivalents at the beginning of the period | 3,803 | 4,064
Cash and cash equivalents at the end of the period | 2,034 | 2,855
Supplemental cash flow activities: |  |
Cash paid for income taxes | 43 | 8
Cash paid for interest | $ 50 | $ 76

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- Definition Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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