Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 217,577	$ 284,628
Agency & Digital Services
Disaggregation of Revenue [Line Items]
Total revenue	25,133	35,759
Contact Centers
Disaggregation of Revenue [Line Items]
Total revenue	$ 61,784	78,298
Contract period	six months to one year
Database Marketing Solutions
Disaggregation of Revenue [Line Items]
Total revenue	$ 25,691	35,210
Contract period	(four to five years
Direct Mail, Logistics, and Fulfillment
Disaggregation of Revenue [Line Items]
Total revenue	$ 104,969	135,361
Revenue for performance obligations recognized over time
Disaggregation of Revenue [Line Items]
Total revenue	197,343	272,975
Revenue for performance obligations recognized over time | Agency & Digital Services
Disaggregation of Revenue [Line Items]
Total revenue	24,306	34,621
Revenue for performance obligations recognized over time | Contact Centers
Disaggregation of Revenue [Line Items]
Total revenue	61,784	78,298
Revenue for performance obligations recognized over time | Database Marketing Solutions
Disaggregation of Revenue [Line Items]
Total revenue	22,414	31,684
Revenue for performance obligations recognized over time | Direct Mail, Logistics, and Fulfillment
Disaggregation of Revenue [Line Items]
Total revenue	88,839	128,372
Revenue for performance obligations recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	20,234	11,653
Revenue for performance obligations recognized at a point in time | Agency & Digital Services
Disaggregation of Revenue [Line Items]
Total revenue	827	1,138
Revenue for performance obligations recognized at a point in time | Contact Centers
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Revenue for performance obligations recognized at a point in time | Database Marketing Solutions
Disaggregation of Revenue [Line Items]
Total revenue	3,277	3,526
Revenue for performance obligations recognized at a point in time | Direct Mail, Logistics, and Fulfillment
Disaggregation of Revenue [Line Items]
Total revenue	16,130	6,989
B2B
Disaggregation of Revenue [Line Items]
Total revenue	48,029	64,026
Consumer Brands
Disaggregation of Revenue [Line Items]
Total revenue	46,874	58,382
Financial Services
Disaggregation of Revenue [Line Items]
Total revenue	45,978	53,919
Healthcare
Disaggregation of Revenue [Line Items]
Total revenue	21,862	19,931
Retail
Disaggregation of Revenue [Line Items]
Total revenue	41,505	66,545
Transportation
Disaggregation of Revenue [Line Items]
Total revenue	$ 13,329	$ 21,825