CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net loss	$ (12,452)	$ (828)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	14,203	13,467
Stock-based compensation	8,703	5,717
Provisions for bad debts, net of recoveries	1,000	360
Loss on disposal of assets	552	401
Provision for excess and obsolete inventory	2,431	5,357
Deferred income tax benefit	(69)	(161)
Impairment charge on equity method investment	1,535	0
Decrease (Increase) in:
Accounts receivable	21,883	(1,882)
Inventories	(9,471)	(12,104)
Prepaid expenses and other current assets	640	(4,257)
(Decrease) Increase in:
Accounts payable and accrued liabilities	(13,404)	569
Increase (decrease) in contract with customer, liability	6,470	0
Income taxes payable	(3,679)	(5,082)
Unearned service revenues	6,470	0
Net cash provided by operating activities	23,466	4,865
Investing activities:
Purchases of property and equipment	(5,922)	(6,895)
Proceeds from sale of investments	33,700	22,000
Purchases of investments	(33,700)	(31,000)
Payments for intangible assets	(2,035)	(1,716)
Acquisition of businesses	0	(27,638)
Loan to Affiliate	(549)	0
Equity investments and advances to affiliates	0	(1,786)
Net cash used in investing activities	(8,506)	(47,035)
Financing activities:
Payments on finance leases	(273)	(84)
Payments of contingent consideration for acquisitions	(3,101)	(638)
Payments for taxes related to net share settlement of equity awards	(1,389)	0
Proceeds from issuance of stock related to stock option exercises	2,328	20,901
Net cash (used in) provided by financing activities	(2,435)	20,179
Increase (decrease) in cash and cash equivalents	10,300	(25,862)
Effect of exchange rate changes on cash and cash equivalents	(2,225)	(3,871)
Cash and cash equivalents, beginning of period	108,783	140,960
Cash and cash equivalents, end of period	119,083	115,098
Customer deposits
(Decrease) Increase in:
Increase (decrease) in contract with customer, liability	(685)	(107)
Unearned service revenues	(685)	(107)
Current portion of unearned service revenues
(Decrease) Increase in:
Increase (decrease) in contract with customer, liability	5,809	3,415
Unearned service revenues	$ 5,809	$ 3,415

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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- Definition

The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

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- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

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