Note C - Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total Revenues	$ 43,754	$ 40,522
Marketing Services [Member]
Total Revenues	12,878	13,500
Customer Care [Member]
Total Revenues	16,544	8,480
Fulfillment and Logistics Services [Member]
Total Revenues	14,332	18,542
Transferred over Time [Member]
Total Revenues	40,438	36,763
Transferred over Time [Member] | Marketing Services [Member]
Total Revenues	11,448	12,779
Transferred over Time [Member] | Customer Care [Member]
Total Revenues	16,544	8,480
Transferred over Time [Member] | Fulfillment and Logistics Services [Member]
Total Revenues	12,446	15,504
Transferred at Point in Time [Member]
Total Revenues	3,316	3,759
Transferred at Point in Time [Member] | Marketing Services [Member]
Total Revenues	1,430	721
Transferred at Point in Time [Member] | Customer Care [Member]
Total Revenues
Transferred at Point in Time [Member] | Fulfillment and Logistics Services [Member]
Total Revenues	$ 1,886	$ 3,038