Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenue	$ 68,062,000	$ 65,802,000
Accounts receivable	600,000	300,000
Contract with customer, liability	2,200,000	2,100,000
Consumer Media
Disaggregation of Revenue [Line Items]
Net revenue	12,581,000	13,170,000
Consumer Media \| Business To Business
Disaggregation of Revenue [Line Items]
Net revenue	7,693,000	8,199,000
Consumer Media \| Sales Channel, Directly to Consumer
Disaggregation of Revenue [Line Items]
Net revenue	4,888,000	4,971,000
Consumer Media \| Software License
Disaggregation of Revenue [Line Items]
Net revenue	5,957,000	6,522,000
Consumer Media \| Subscription Services
Disaggregation of Revenue [Line Items]
Net revenue	3,586,000	4,148,000
Consumer Media \| Product Sales
Disaggregation of Revenue [Line Items]
Net revenue	1,301,000	825,000
Consumer Media \| Advertising And Other
Disaggregation of Revenue [Line Items]
Net revenue	1,737,000	1,675,000
Mobile Services
Disaggregation of Revenue [Line Items]
Net revenue	26,889,000	27,143,000
Mobile Services \| Business To Business
Disaggregation of Revenue [Line Items]
Net revenue	26,495,000	26,691,000
Mobile Services \| Sales Channel, Directly to Consumer
Disaggregation of Revenue [Line Items]
Net revenue	394,000	452,000
Mobile Services \| Software License
Disaggregation of Revenue [Line Items]
Net revenue	5,110,000	3,101,000
Mobile Services \| Subscription Services
Disaggregation of Revenue [Line Items]
Net revenue	21,779,000	24,042,000
Mobile Services \| Product Sales
Disaggregation of Revenue [Line Items]
Net revenue	0	0
Mobile Services \| Advertising And Other
Disaggregation of Revenue [Line Items]
Net revenue	0	0
Games
Disaggregation of Revenue [Line Items]
Net revenue	28,592,000	25,489,000
Games \| Business To Business
Disaggregation of Revenue [Line Items]
Net revenue	4,664,000	4,710,000
Games \| Sales Channel, Directly to Consumer
Disaggregation of Revenue [Line Items]
Net revenue	23,928,000	20,779,000
Games \| Software License
Disaggregation of Revenue [Line Items]
Net revenue	0	0
Games \| Subscription Services
Disaggregation of Revenue [Line Items]
Net revenue	10,794,000	12,121,000
Games \| Product Sales
Disaggregation of Revenue [Line Items]
Net revenue	13,879,000	9,823,000
Games \| Advertising And Other
Disaggregation of Revenue [Line Items]
Net revenue	$ 3,919,000	$ 3,545,000

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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