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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Cash provided by (used for) operating activities: |  |
Net income (loss) | $ 5,846 | $ (1,005)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities: |  |
Depreciation and amortization | 7,498 | 8,019
Provision for bad debts | 237 | 3
Deferred income taxes | 835 | 2,966
Shares issued for employee benefit plan | 527 | 347
Employee and director stock-based compensation | 2,303 | 1,918
Performance-based common stock warrants | 184 | 434
Loss on sale of Ohio call center | 712 | 0
Changes in operating assets and liabilities: |  |
Accounts receivable and contract assets | 2,060 | (14,056)
Inventories | 1,609 | (3,982)
Prepaid expenses and other assets | 118 | 735
Accounts payable and accrued liabilities | (28,969) | 3,017
Accrued income taxes | (1,307) | (2,943)
Net cash provided by (used for) operating activities | (8,347) | (4,547)
Cash provided by (used for) investing activities: |  |
Acquisitions of property, plant and equipment | (1,986) | (2,800)
Acquisitions of intangible assets | (1,270) | (653)
Payment on sale of Ohio call center | (500) | 0
Net cash provided by (used for) investing activities | (3,756) | (3,453)
Cash provided by (used for) financing activities: |  |
Borrowings under line of credit | 25,000 | 25,000
Repayments on line of credit | (15,000) | (20,000)
Treasury stock purchased | (6,291) | (1,215)
Contingent consideration payments in connection with business combinations | (3,091) | (4,251)
Net cash provided by (used for) financing activities | 618 | (466)
Effect of exchange rate changes on cash and cash equivalents | (3,890) | 154
Net increase (decrease) in cash and cash equivalents | (15,375) | (8,312)
Cash and cash equivalents at beginning of period | 74,302 | 53,207
Cash and cash equivalents at end of period | 58,927 | 44,895
Supplemental cash flow information: |  |
Income taxes paid | 1,384 | 1,942
Interest paid | $ 637 | $ 1,186

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