CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net loss	$ (24,220,000)	$ (11,884,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities
Impairment of goodwill	2,797,000	0
Depreciation	3,748,000	4,610,000
Amortization of internally developed software	2,671,000	2,180,000
Amortization of intangible assets	2,151,000	2,350,000
(Gain) loss on disposal of property and equipment	(11,000)	2,000
Unrealized foreign currency losses (gains)	795,000	(268,000)
Non-cash interest expense related to debt agreements	15,000	18,000
Stock-based compensation related to equity awards and restricted stock	3,683,000	8,592,000
Provision for bad debts	1,040,000	852,000
Payment of contingent consideration for prior acquisition	0	(93,000)
Changes in operating assets and liabilities
Accounts receivable	4,798,000	560,000
Prepaid expenses and other current assets	(959,000)	309,000
Other assets	(98,000)	(340,000)
Accounts payable	(692,000)	246,000
Deferred revenues	(354,000)	(280,000)
Accrued expenses and other liabilities	169,000	(2,050,000)
Net cash (used in) provided by operating activities	(4,467,000)	4,804,000
Investing activities
Purchases of property and equipment	(351,000)	(1,154,000)
Proceeds from disposal of property and equipment	11,000	3,000
Capitalization of internally developed software	(1,398,000)	(4,050,000)
Net cash used in investing activities	(1,738,000)	(5,201,000)
Financing activities
Repayments of capital lease obligations	(788,000)	(1,223,000)
Proceeds from exercise of common stock options	0	350,000
Proceeds from employee stock purchase plan, net	215,000	592,000
Net cash used in financing activities	(573,000)	(281,000)
Effect of foreign exchange rate changes on cash and cash equivalents and restricted cash	1,714,000	(206,000)
Net decrease in cash and cash equivalents and restricted cash	(5,064,000)	(884,000)
Beginning of period	35,713,000	37,326,000
End of period	30,649,000	36,442,000
Supplemental disclosure of non-cash investing and financing activities
Acquisition of equipment through capital leases	181,000	1,283,000
Purchases of property and equipment recorded in accounts payable and accrued expenses	693,000	9,000
Issuance of common stock under employee stock purchase plan	$ 130,000	$ 328,000