Share-Based Compensation (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Share-based compensation expense:
Share-based compensation costs		$ 1,366	$ 656
Amount capitalized to internal use software		2	3
Total share-based compensation costs		1,364	653
Cost of revenues [Member]
Share-based compensation expense:
Share-based compensation costs		14	25
Sales and marketing [Member]
Share-based compensation expense:
Share-based compensation costs	[1]	632	140
Technology support [Member]
Share-based compensation expense:
Share-based compensation costs	[2]	332	74
General and administrative [Member]
Share-based compensation expense:
Share-based compensation costs	[3]	$ 388	$ 417

[1] Certain awards were modified in connection with the termination of one of the Company's 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 three months ended March 31, 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 one of the Company's executive officer's employment with the Company. The total expense related to acceleration of vested awards was approximately $0.2 million in the three months ended March 31, 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 three months ended March 31, 2015.