Related-Party Transactions - Relationship with HandsOn Global Management (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2016	Dec. 31, 2015
Related-Party Transactions
Amount of related party transaction	$ 1,551	$ 998
Related party expense	1,551	998
HGM | Travel Expense | Maximum
Related-Party Transactions
Amount of related party transaction	100	100
Entities affiliated with HGM managed funds | Master Service Agreement
Related-Party Transactions
Revenue share percentage			25.00%	25.00%
SourceHOV | Master Service Agreement
Related-Party Transactions
Revenue share percentage			75.00%	75.00%
SourceHOV | Entities affiliated with HGM managed funds | Master Service Agreement
Related-Party Transactions
Related party expense	$ 400
SourceHOV | Entities affiliated with HGM managed funds | Master Service Agreement | Maximum
Related-Party Transactions
Related party expense		$ 100