Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income (loss)	$ 17,479	$ (676)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	9,403	14,382
Stock-based compensation expense	5,296	4,097
Deferred income taxes	(82)	677
Bad debt provision	268	1,433
Change in fair value of contingent consideration	677	9,975
Other operating activities	157	157
Change in assets:
Accounts receivable and unbilled revenue	(38,108)	(12,798)
Inventories	(17,106)	(12,050)
Prepaid expenses and other assets	(10,401)	3,574
Change in liabilities:
Accounts payable	8,312	(40,264)
Accrued expenses and other liabilities	11,722	7,861
Net cash used in operating activities	(12,383)	(23,632)
Cash flows from investing activities
Purchases of property and equipment	(10,274)	(10,502)
Net cash used in investing activities	(10,274)	(10,502)
Cash flows from financing activities
Net borrowings from revolving credit facilities	42,258	34,722
Net short-term secured borrowings	633	(820)
Repurchases of common stock	(10,041)	0
Payments of contingent consideration	(15,345)	(11,008)
Proceeds from exercise of stock options	1,824	2,002
Other financing activities	(850)	(680)
Net cash provided by financing activities	18,479	24,216
Effect of exchange rate changes on cash and cash equivalents	936	(50)
Decrease in cash and cash equivalents	(3,242)	(9,968)
Cash and cash equivalents, beginning of period	30,924	30,755
Cash and cash equivalents, end of period	$ 27,682	$ 20,787