CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net loss	$ (49,409)	$ (18,261)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,925	6,655
Stock-based compensation	8,584	6,358
Inventory write-downs	8,132	0
Asset impairment charges	4,571	0
Deferred income tax expense (benefit) and other non-cash charges	(41)	80
Provision for excess and obsolete inventory	1,033	82
Amortization of debt discount and issuance costs	181	0
Loss on disposal of assets	130	6
Provisions for bad debts, net of recoveries	408	(48)
Decrease (Increase) in:
Accounts receivable	3,280	5,102
Inventories	1,587	4,311
Prepaid expenses and other current assets	3,105	(6,101)
(Decrease) Increase in:
Accounts payable and accrued liabilities	(277)	(2,398)
Income taxes payable	(263)	1,007
Customer deposits	(1,210)	1,769
Unearned service revenues	(750)	(1,822)
Other liabilities	(193)	0
Net cash used in operating activities	(13,207)	(3,260)
Investing activities:
Purchases of property and equipment	(4,312)	(3,481)
Purchases of short-term investments	(20,024)	0
Cash paid for technology development, patents and licenses	(3,616)	(5,548)
Net cash used in investing activities	(27,952)	(9,029)
Financing activities:
Payments on finance leases	(105)	(116)
Payments for taxes related to net share settlement of equity awards	(277)	(1,165)
Proceeds from issuance of 5.50% Convertible Senior Notes, due 2028, net of discount, issuance cost and accrued interest	72,310	0
Net cash provided by (used in) financing activities	71,928	(1,281)
Effect of exchange rate changes on cash and cash equivalents	(353)	(6,450)
Increase (Decrease) in cash and cash equivalents	30,416	(20,020)
Cash and cash equivalents, beginning of period	37,812	121,989
Cash and cash equivalents, end of period	$ 68,228	$ 101,969