Selected Balance Sheet Accounts (Details 1) - USD ($)	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Intangible Assets
Gross	$ 25,544,000	$ 25,544,000
Accumulated amortization	(23,815,000)	23,011,000
Intangible Net	1,729,000	2,533,000
Trademarks and Trade Names [Member]
Intangible Assets
Gross	16,589,000	16,589,000
Accumulated amortization	16,221,000	15,961,000
Intangible Net	$ 368,000	628,000
Minimum | Trademarks and Trade Names [Member]
Intangible Assets
Estimated useful life	3 years
Maximum | Trademarks and Trade Names [Member]
Intangible Assets
Estimated useful life	7 years
Developed Technology Rights
Intangible Assets
Gross	$ 8,955,000	8,955,000
Accumulated amortization	7,594,000	7,050,000
Intangible Net	$ 1,361,000	1,905,000
Developed Technology Rights | Minimum
Intangible Assets
Estimated useful life	5 years
Developed Technology Rights | Maximum
Intangible Assets
Estimated useful life	7 years
Domain
Intangible Assets
Gross	$ 2,200,000	2,200,000
Accumulated amortization	0	0
Intangible Net	$ 2,200,000	$ 2,200,000