Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 4,580	$ 3,463
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1,604	901
Purchase accounting adjustments to goodwill	0	372
Gain on disposal of property and equipment, net	0	(23)
Bond premium amortization	218	375
Stock-based compensation	3,447	2,220
Deferred income taxes	(1,216)	(721)
Unrecognized tax benefits	134	96
Tax shortfall from stock-based compensation	0	21
Change in assets and liabilities:
Accounts and notes receivable	(3,538)	(2,195)
Inventory	(13,686)	(4,327)
Prepaid expenses and other assets	(11,027)	(4,070)
Accounts payable, accrued and other liabilities	6,264	5,560
Deferred revenue	6,313	4,380
Customer deposits	298	1,041
Net cash provided by (used in) operating activities	(6,609)	7,093
Cash flows from investing activities:
Purchases of investments	0	(20,328)
Proceeds from call / maturity of investments	18,801	18,033
Purchases of property and equipment	(2,343)	(1,280)
Proceeds from disposal of property and equipment	0	36
Purchases of intangible assets	(95)	(98)
Business acquisitions, net of cash acquired	(6,479)
Net cash provided by (used in) investing activities	9,884	(3,637)
Cash flows from financing activities:
Repurchase of common stock	0	(8,962)
Proceeds from options exercised	296	30
Payroll tax payments for net-settled stock awards	(2,165)	(744)
Payments on capital lease obligation	(8)	(10)
Payments on notes payable	0	(15)
Tax shortfall from stock-based compensation	0	(21)
Net cash used in financing activities	(1,877)	(9,722)
Effect of exchange rate changes on cash and cash equivalents	(75)	105
Net decrease in cash and cash equivalents	1,323	(6,161)
Cash and cash equivalents, beginning of period	40,651	59,526
Cash and cash equivalents, end of period	41,974	53,365
Supplemental disclosure:
Cash paid for income taxes, net of refunds	145	3,533
Non-cash transactions
Property and equipment purchases in accounts payable and accrued liabilities	794	54
Contingent consideration related to business combinations	$ 1,007	$ 0