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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Cash Flows From Operating Activities: |  |
Net income | $ 6,931 | $ 8,915
Adjustments to reconcile net income to net cash provided by operating activities |  |
Depreciation and amortization | 7,627 | 7,327
Deferred income taxes | (841) | (491)
Stock based compensation expense | 1,720 | 1,540
Debt issue cost amortization recorded in interest expense | 73 | 87
Other | 885 | (166)
Changes in operating assets and liabilities, net of acquisition: |  |
Trade receivables | (1,178) | (8,692)
Inventories | (5,193) | 1,973
Prepaid expenses and other assets | 1,472 | (289)
Accounts payable | (1,627) | (795)
Accrued liabilities | (3,270) | (557)
Net cash provided by operating activities | 6,599 | 8,852
Cash Flows From Investing Activities: |  |
Purchase of property and equipment | (3,614) | (6,401)
Cash paid for acquisitions, net of cash acquired | (14,728) |
Net cash used in investing activities | (18,342) | (6,401)
Cash Flows From Financing Activities: |  |
Borrowings on long term debt | 26,979 | 7,695
Principal payments of long-term debt | (7,937) | (7,000)
Payment of debt issuance costs | (401) |
Dividends paid to stockholders | (569) | (605)
Stock transactions under employee benefit stock plans | (797) | (710)
Net cash provided by (used in) financing activities | 17,275 | (620)
Effect of foreign exchange rate changes on cash | 71 | (41)
Net increase in cash and cash equivalents | 5,603 | 1,790
Cash and cash equivalents at beginning of period | 13,416 | 8,673
Cash and cash equivalents at end of period | $ 19,019 | $ 10,463

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