Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net loss	$ (3,301)	$ (2,077)
Adjustments to reconcile net loss to net cash provided by operating activities:
Change in allowance for doubtful accounts	(36)	(303)
Change in the fair value of acquisition-related contingent consideration	(495)	100
Amortization of the fair value adjustment related to warranty liabilities acquired through acquisitions		(8)
Amortization of deferred financing fees	229	155
Depreciation and amortization	11,022	8,959
Stock-based compensation	1,524	1,386
Foreign exchange (gain) loss	(26)	351
Deferred income taxes	155	203
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(6,399)	(1,096)
Inventories	(151)	(864)
Prepaid expenses and other assets	1,768	(969)
Accounts payable and accrued liabilities	(3,461)	(877)
Deferred revenue	(229)	(1,178)
Other liabilities	(98)	(118)
Net cash provided by operating activities	502	3,664
Cash flows from investing activities:
Capital expenditures	(5,645)	(9,835)
Net cash (used in) investing activities	(5,645)	(9,835)
Cash flows from financing activities:
Effect of exchange rate changes on cash and cash equivalents	75	252
Net decrease in cash and cash equivalents	(5,068)	(5,919)
Beginning of period	25,023	27,077
End of period	19,955	21,158
Cash paid for
Interest	2,194	2,198
Income taxes		138
Noncash investing and financing activities:
Capital expenditures incurred not yet paid	1,391	3,777
Capital expenditure milestone payable incurred not yet paid		5,070
Stock-based compensation related to capital expenditures	$ 131	$ 66