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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Operating activities |  |
Net loss | $ (1,864) | $ (8,091)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 5,590 | 6,670
Loss on disposal of property, plant and equipment | 30 | 121
Stock-based compensation | 8,019 | 7,985
Deferred income taxes | (120) | 0
Noncash lease expense | 1,139 | 903
Revaluation of acquisition-related contingent consideration | 5 | (485)
Effect of foreign currency on operations | 637 | (224)
Impairment loss | 429 | 1,410
Changes in operating assets and liabilities: |  |
Accounts receivable | (6,459) | (1,302)
Supplies and inventory | (2,303) | 1,055
Prepaid expenses and other current assets | (2,738) | (3,064)
Other assets | 259 | (491)
Operating lease liabilities | (1,053) | (950)
Accounts payable | (1,544) | 2,012
Accrued liabilities and deferred revenue | (8,993) | (7,721)
Net cash used in operating activities | (8,966) | (2,172)
Investing activities |  |
Acquisition of C2i, net of cash acquired | 5,012 | 0
Purchase of short-term investments | 0 | (19,700)
Proceeds from sale of short-term investments | 0 | 39,773
Proceeds from maturity of short-term investments | 0 | 5,000
Purchases of property, plant and equipment | (2,134) | (993)
Net cash provided by investing activities | 2,878 | 24,080
Financing activities |  |
Payment of taxes on vested restricted stock units | (3,832) | (2,277)
Proceeds from the exercise of common stock options and employee stock purchases | 2,968 | 3,962
Net cash (used in) provided by financing activities | (864) | 1,685
Increase (decrease) in cash, cash equivalents and restricted cash | (6,952) | 23,593
Effect of foreign currency on cash, cash equivalents and restricted cash | (108) | 50
Net increase (decrease) in cash, cash equivalents and restricted cash | (7,060) | 23,643
Cash, cash equivalents and restricted cash at beginning of period | 217,330 | 154,996
Cash, cash equivalents and restricted cash at end of period | 210,270 | 178,639
Supplementary cash flow information: |  |
Purchases of property, plant and equipment included in accounts payable and accrued liability | 1,754 | 1,624
Cash and cash equivalents | 209,188 |
Restricted cash | 1,082 |
Total cash, cash equivalents and restricted cash | $ 210,270 | $ 178,639

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