Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	$ 12,988	$ 13,390	$ 17,916
Stock-based compensation expense	5,302	6,820	5,572
Deferred income taxes	(4,441)	4,072	4,226
Change in fair value of contingent consideration liability	0	677	10,417
Goodwill Impairment	46,319	0	0
Impairment of Intangible Assets, Finite-lived	18,121	0	70
Bad debt provision	3,601	454	2,171
Implementation cost amortization	433	0	0
Excess tax benefit from exercise of stock awards	0	0	(4,030)
Other operating activities	255	210	210
Change in assets:
Accounts receivable and unbilled revenue	4,112	(41,877)	(2,651)
Inventories	(16,325)	(4,245)	6,355
Prepaid expenses and other assets	1,432	(13,547)	(8,206)
Change in liabilities:
Accounts payable	21,959	18,152	(38,408)
Accrued expenses and other liabilities	5,473	11,162	12,069
Net cash provided by operating activities	23,058	11,698	9,660
Cash flows from investing activities
Purchases of property and equipment	(11,263)	(12,483)	(13,319)
Proceeds from sale of property and equipment	122	0	0
Net cash used in investing activities	(11,141)	(12,483)	(13,319)
Cash flows from financing activities
Net borrowing (repayments) of revolving credit facility	14,539	(867)	8,739
Net short-term secured (repayments) borrowings	(1,525)	20,709	405
Repurchases of common stock	(25,689)	(10,885)	0
Payments of contingent consideration	0	(10,989)	(10,509)
Proceeds from exercise of stock options	545	2,663	2,636
Excess tax benefit from exercise of stock awards	0	0	4,030
Other financing activities	(1,606)	(1,156)	(866)
Net cash (used in) provided by financing activities	(13,736)	(525)	4,435
Effect of exchange rate changes on cash and cash equivalents	(1,973)	948	(607)
(Decrease) Increase in cash and cash equivalents	(3,792)	(362)	169
Cash and cash equivalents, beginning of period	30,562	30,924	30,755
Cash and cash equivalents, end of period	$ 26,770	$ 30,562	$ 30,924