CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net loss	$ (18,261)	$ (4,397)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	6,655	6,289
Stock-based compensation	6,358	5,377
Provisions for bad debts, net of recoveries	80	(43)
Loss on disposal of assets	82	86
Provision for excess and obsolete inventory	6	1,640
Deferred income tax expense (benefit)	(48)	(2,009)
Decrease (Increase) in:
Accounts receivable	5,102	3,964
Inventories	4,311	(7,495)
Prepaid expenses and other current assets	(6,101)	(982)
(Decrease) Increase in:
Accounts payable and accrued liabilities	(2,398)	(13,525)
Income taxes payable	1,007	(2,310)
Customer deposits	1,769	1,723
Unearned service revenues	(1,822)	(627)
Net cash used in operating activities	(3,260)	(12,309)
Investing activities:
Purchases of property and equipment	(3,481)	(2,072)
Cash paid for technology development, patents and licenses	(5,548)	(1,780)
Acquisition of business, net of cash acquired	0	(33,908)
Net cash used in investing activities	(9,029)	(37,760)
Financing activities:
Payments on finance leases	(116)	(167)
Payments for taxes related to net share settlement of equity awards	(1,165)	(3,779)
Proceeds from issuance of stock related to stock option exercises	0	5,165
Net cash (used in) provided by financing activities	(1,281)	1,219
Effect of exchange rate changes on cash and cash equivalents	(6,450)	(3,446)
Decrease in cash and cash equivalents	(20,020)	(52,296)
Cash and cash equivalents, beginning of period	121,989	185,633
Cash and cash equivalents, end of period	$ 101,969	$ 133,337