CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Operating activities
Net loss	$ (4,413)		$ (9,660)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	1,665		1,630
Amortization of internally developed software	681		542
Amortization of intangible assets	826		646
Loss on disposal of property and equipment	1		4
Unrealized foreign currency losses (gains)	7		(243)
Noncash interest expense related to warrants issued in connection with debt	7		9
Stock-based compensation related to equity awards and restricted stock	3,822		3,495
Provision for bad debts	195		100
Deferred income tax benefits	0		(80)
Excess tax benefits from stock-based award activities	0		(8)
Changes in operating assets and liabilities, net of effect of acquisitions
Accounts receivable	(2,204)		(26)
Prepaid expenses and other current assets	0		(1,215)
Other assets	(6)		552
Accounts payable	(331)		961
Deferred revenues	122		(318)
Accrued expenses and other current liabilities	323		(169)
Net cash provided by (used in) operating activities	695		(3,780)
Investing activities
Purchases of property and equipment	(267)		(2,342)
Capitalization of internally developed software	(1,493)		(827)
Payment of contingent consideration for prior acquisition	(93)		0
Acquisition of business, net of cash acquired	0		(7,509)
Net cash used in investing activities	(1,853)		(10,678)
Financing activities
Repayment of notes payable	(646)		(929)
Repurchase of unvested shares	0		(2)
Proceeds from exercise of common stock options	162		333
Proceeds from employee stock purchase plan, net	384		361
Stock issuance costs	0		(51)
Excess tax benefits from stock-based award activities	0		8
Net cash used in financing activities	(100)		(280)
Effect of foreign exchange rate changes on cash and cash equivalents	169		(717)
Net decrease in cash and cash equivalents	(1,089)		(15,455)
Beginning of period	37,326	[1]	68,253
End of period	36,237		52,798
Supplemental disclosure of noncash investing and financing activities
Purchases of property and equipment recorded in accounts payable and accrued expenses	4		1,027
Issuance of common stock in connection with acquisition of business	$ 0		$ 4,337

[1] Derived from our audited consolidated financial statements as of December 31, 2015.