Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest Paid			$ 15	$ 78
Property and Equipment Balances, Accounts Payable and Accrued Expenses	$ 800	$ 596	800	596
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(46)	(4)
Cash flows from operating activities
Net loss	(2,853)	(6,068)	(5,920)	(13,408)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,089	1,962	3,965	3,848
Deferred Income Tax Expense (Benefit)			160	160
Non-cash interest expense (income)			0	(1)
Share‑based compensation			4,620	3,766
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable			(1,247)	(1,618)
Prepaid expenses and other assets			(202)	105
Deferred revenue, including long-term portion			5,914	5,317
Accounts payable			(13)	582
Accrued expenses and other			517	220
Net cash provided by (used in) operating activities			7,794	(1,029)
Cash flows from investing activities
Increase (Decrease) in Restricted Cash			(1,226)	0
Purchases of property and equipment, including software development costs			(7,890)	(3,625)
Net cash used in investing activities			(9,116)	(3,625)
Cash flows from financing activities
Principal payments on loan payable			0	(99)
Payments on capital leases			(408)	(397)
Proceeds from exercise of options and warrants			3,067	1,552
Payments for Repurchase of Common Stock			(91)	(4,096)
Net cash provided by financing activities			2,568	(4,603)
Effect of changes in foreign exchange rates on cash and cash equivalents			(24)	5
Net increase (decrease) in cash and cash equivalents			1,222	(9,252)
Cash and cash equivalents, beginning of period		67,878	66,758	77,130
Cash and cash equivalents, end of period	67,980		67,980
Supplemental Cash Flow Information [Abstract]
Accretion		105	0	199
Net Income (Loss) Available to Common Stockholders, Basic	(2,853)	$ (6,079)	(5,920)	(13,438)
Payment to Acquire Non-controlling Interest, Equity			0	(1,563)
Redeemable Non-Controlling Interest [Member]
Supplemental Cash Flow Information [Abstract]
Accretion	$ 0		$ 0	$ 199