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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities:    
Net income (loss) $ (10,307) $ 10,123
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 5,985 4,307
Non-cash operating lease cost 1,266 1,319
Stock-based compensation to employees and directors 5,795 4,639
(Increase) decrease in deferred tax assets, net (3,449) 959
Loss from equity method securities 7,181 299
Other non-cash adjustments (102) (123)
Changes in operating assets and liabilities:    
Accounts receivable, net (4,378) (2,559)
Inventories 288 (282)
Prepaids and other current assets 1,109 1,604
Other long-term assets, net (369) (307)
Accounts payable 10,220 4,339
Accrued liabilities 5,377 7,886
Unearned revenue 2,643 2,034
Operating lease liabilities (1,352) (1,329)
Other long-term liabilities 100 284
Net cash provided by operating activities 20,007 33,193
Cash flows from investing activities:    
Disbursement for notes receivable (10,000) 0
Purchase of equity securities 0 (11,420)
Capital distribution from investment 0 1,162
Expenditures for property and equipment (5,256) (3,256)
Other investing activities, net 425 (281)
Net cash used in investing activities (14,831) (13,795)
Cash flows from financing activities:    
Repurchase of shares 0 (25,165)
Payments of taxes withheld upon vesting of employee stock awards (1,934) (3,267)
Other financing activities, net 229 (854)
Net cash used in financing activities (1,705) (29,286)
Net increase (decrease) in cash, cash equivalents, and restricted cash 3,471 (9,888)
Cash, cash equivalents, and restricted cash, beginning of period 371,457 503,366
Cash, cash equivalents, and restricted cash, end of period $ 374,928 $ 493,478