Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net loss	$ (41,244)	$ (31,491)	$ (16,480)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities
Impairment of goodwill	14,740	2,797
Depreciation	2,658	4,758	6,035
Amortization of internally developed software	3,774	3,669	2,988
Amortization of Intangible Assets, Total	2,537	2,850	3,080
Amortization of deferred costs to obtain and fulfill contracts	2,045
Gain on disposal of property and equipment	(1)	(11)	(3)
Unrealized foreign currency (gains) losses	(118)	986	(419)
Non-cash interest expense related to debt agreements		15	27
Stock-based compensation related to equity awards and restricted stock	3,971	4,704	10,295
Provision for bad debts	48	1,507	2,328
Deferred income tax benefits	(398)	(358)	(305)
Payment of contingent consideration for prior acquisition			(93)
Changes in operating assets and liabilities
Accounts receivable	(668)	4,754	795
Prepaid expenses and other assets	(609)	(310)	200
Accounts payable	(97)	306	741
Accrued expenses and other liabilities	382	954	(3,108)
Net cash (used in) provided by operating activities	(12,980)	(4,870)	6,081
Investing activities
Purchases of property and equipment	(586)	(461)	(1,207)
Proceeds from disposal of property and equipment	8	11	5
Capitalization of internally developed software	(2,129)	(2,068)	(4,712)
Net cash used in investing activities	(2,707)	(2,518)	(5,914)
Financing activities
Repayments of capital lease obligations and other debt agreements	(1,304)	(1,160)	(1,436)
Employee taxes paid for withheld shares upon equity award settlement	(265)	(604)	(362)
Proceeds from exercises of common stock options	0	0	390
Proceeds from employee stock purchase plan, net	282	312	663
Net cash used in financing activities	(1,287)	(1,452)	(745)
Effect of foreign exchange rate changes on cash and cash equivalents and restricted cash	(360)	1,964	(1,035)
Net decrease in cash and cash equivalents and restricted cash	(17,334)	(6,876)	(1,613)
Cash and cash equivalents and restricted cash
Beginning of year	28,837	35,713	37,326
End of year	11,503	28,837	35,713
Supplemental disclosures of other cash flow information
Cash paid for interest	153	210	189
Cash paid for income taxes	730	1,491	728
Supplemental disclosure of non-cash investing and financing activities
Issuance of common stock under employee stock purchase plan	305	362	548
Purchases of property and equipment recorded in accounts payable and accrued expenses	10	30	5
Acquisition of equipment through capital leases		$ 852	$ 1,864