Stockholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation
Share-based compensation costs	$ 1,984	$ 2,402	$ 4,867
Amount capitalized to internal use software	0	0	1
Total share-based compensation costs	1,984	2,402	4,866
Cost of Revenues
Share-based Compensation
Share-based compensation costs	0	0	23
Sales and Marketing
Share-based Compensation
Share-based compensation costs	116	304	982
Technology Support
Share-based Compensation
Share-based compensation costs	81	197	1,247
General and Administrative
Share-based Compensation
Share-based compensation costs	$ 1,787	$ 1,901	$ 2,615

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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