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Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 09, 2020
Jun. 09, 2014
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jul. 08, 2020
Nov. 30, 2014
Summary of Significant Accounting Policies (Details) [Line Items]              
Stockholders' Equity, Reverse Stock Split 1 for 10            
Common Stock, Par or Stated Value Per Share (in Dollars per share) $ 0.001   $ 0.001 $ 0.001      
Common Stock, Shares, Outstanding (in Shares) 4,239,578   5,694,772 3,521,037   42,395,782  
Contract with Customer, Refund Liability     $ 42,100 $ 38,400      
Inventory Valuation Reserves     10,800 12,900      
Depreciation     9,800 12,900 $ 12,200    
Gain (Loss) on Disposition of Other Assets     (149) (972) 0    
Advertising Expense     $ 10,100 $ 13,800 $ 13,700    
Treasury Stock, Shares, Acquired (in Shares)   311,284          
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)   $ 77.10          
Treasury Stock, Value, Acquired, Cost Method   $ 24,000          
Minimum [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Cash Discount, Discount Rate     1.00%        
Maximum [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Cash Discount, Discount Rate     20.00%        
Joint Venture With Meisheng Cultural & Creative Corp. [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Joint venture, ownership percentage     51.00%       51.00%
Convertible Debt Securities [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)     5,758,365 2,160,682 2,907,498    
Restricted Stock [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)     185,455 142,350 113,023