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Selected Balance Sheet Accounts (Details 1) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Intangible Assets      
Gross $ 45,107   $ 45,107
Accumulated amortization (41,770)   (40,203)
Net 5,537   7,104
Trademarks and Trade Names      
Intangible Assets      
Gross 16,589   16,589
Accumulated amortization (15,701)   (15,442)
Net $ 888   $ 1,147
Trademarks and Trade Names | Minimum      
Finite-Lived Intangible Assets      
Estimated useful life 3 years   3 years
Trademarks and Trade Names | Maximum      
Finite-Lived Intangible Assets      
Estimated useful life 7 years   7 years
Customer Relationships      
Intangible Assets      
Gross $ 19,563   $ 19,563
Accumulated amortization (19,563)   (18,800)
Net $ 0   $ 763
Customer Relationships | Minimum      
Finite-Lived Intangible Assets      
Estimated useful life 2 years   2 years
Customer Relationships | Maximum      
Finite-Lived Intangible Assets      
Estimated useful life 5 years   5 years
Developed Technology Rights      
Intangible Assets      
Gross $ 8,955   $ 8,955
Accumulated amortization (6,506)   (5,961)
Net $ 2,449   2,994
Developed Technology Rights | Minimum      
Finite-Lived Intangible Assets      
Estimated useful life 5 years 5 years  
Developed Technology Rights | Maximum      
Finite-Lived Intangible Assets      
Estimated useful life 7 years 7 years  
Domain      
Intangible Assets      
Gross $ 2,200   2,200
Accumulated amortization 0   0
Net $ 2,200   $ 2,200