Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 6,856	$ 7,113
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	3,400	1,843
Purchase accounting adjustments to goodwill	0	349
Loss on inventory nonmonetary exchanges	0	90
Gain on disposal of property and equipment, net	0	(17)
Loss on disposal of intangible assets	0	14
Bond premium amortization	427	712
Stock-based compensation	7,423	4,526
Deferred income taxes	(1,458)	(1,445)
Unrecognized tax benefits	282	193
Tax benefit from stock-based compensation	0	(88)
Change in assets and liabilities:
Accounts and notes receivable	(4,500)	(3,211)
Inventory	(25,768)	(6,748)
Prepaid expenses and other assets	(21,484)	(14,657)
Accounts payable, accrued and other liabilities	7,474	5,078
Deferred revenue	14,829	15,812
Customer deposits	73	772
Net cash provided by (used in) operating activities	(12,446)	10,336
Cash flows from investing activities:
Purchases of investments	(19,950)	(28,667)
Proceeds from call / maturity of investments	34,377	32,429
Purchases of property and equipment	(5,741)	(1,964)
Proceeds from disposal of property and equipment	0	33
Purchases of intangible assets	(170)	(185)
Business acquisitions, net of cash acquired	(6,479)
Net cash provided by investing activities	2,037	1,646
Cash flows from financing activities:
Repurchase of common stock	0	(33,746)
Proceeds from options exercised	1,241	222
Payroll tax payments for net-settled stock awards	(2,572)	(1,036)
Payments on capital lease obligation	(16)	(19)
Payments on notes payable	0	(29)
Tax benefit from stock-based compensation	0	88
Net cash used in financing activities	(1,347)	(34,520)
Effect of exchange rate changes on cash and cash equivalents	(857)	318
Net decrease in cash and cash equivalents	(12,613)	(22,220)
Cash and cash equivalents, beginning of period	40,651	59,526
Cash and cash equivalents, end of period	28,038	37,306
Supplemental disclosure:
Cash paid for income taxes, net of refunds	9,934	8,271
Non-cash transactions
Property and equipment purchases in accounts payable and accrued liabilities	1,351	90
Contingent consideration related to business combinations	$ 1,026	$ 0