Share-Based Compensation (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based compensation expense:
Share-based compensation costs		$ 871	$ 554	$ 2,238	$ 1,221
Amount capitalized to internal use software		5	2	8	6
Total share-based compensation costs		866	552	2,230	1,205
Cost of revenues [Member]
Share-based compensation expense:
Share-based compensation costs		14	38	28	63
Sales and marketing [Member]
Share-based compensation expense:
Share-based compensation costs	[1]	341	146	974	287
Technology support [Member]
Share-based compensation expense:
Share-based compensation costs	[2]	98	153	429	227
General and administrative [Member]
Share-based compensation expense:
Share-based compensation costs	[3]	$ 418	$ 217	$ 807	$ 634

[1] Certain awards were modified in connection with the termination of an executive officer's employment with the Company and their vesting accelerated in accordance with the terms of the applicable option agreements. The total expense related to these modifications and acceleration of vested awards was approximately $0.3 million in the six months ended June 30, 2016.

[2] The vesting of certain awards was accelerated in accordance with the terms of the applicable option agreements in connection with the termination of an executive officer's employment with the Company. The total expense related to acceleration of vested awards was approximately $0.2 million in the six months ended June 30, 2016.

[3] Certain awards were modified in accordance with the Company's former Chief Financial Officer's consulting agreement and their vesting accelerated in accordance with the terms of the applicable option agreements. The total expense related to these modifications and acceleration of vested awards was approximately $0.2 million in the six months ended June 30, 2015.