Goodwill and Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Apr. 01, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 1,593,000		$ 1,593,000
Net carrying value	598,000		598,000			$ 304,000
Amortization expense	140,000	$ 200,000	216,000	$ 400,000
Publishing [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets excluding goodwill	0		0
Goodwill	0		0
Cubic Creative, Inc.[Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	1,593,000		1,593,000		$ 1,593,000
Customer Relationships [Member] | Marketing Services [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets excluding goodwill	510,000		$ 510,000
Definite-lived intangibles, useful life			2 years
Net carrying value	446,000		$ 446,000
Developed Technology [Member] | Marketing Services [Member]
Finite-Lived Intangible Assets [Line Items]
Definite-lived intangibles	1,520,000		1,520,000
Net carrying value that will be fully expensed by end of 2019	$ 152,000		$ 152,000
Definite-lived intangibles, useful life			5 years