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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