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Basis of Presentation and New Accounting Standards (Details)
$ / shares in Units, $ in Thousands
 6 Months Ended
Aug. 06, 2019
shares
Aug. 05, 2019
$ / shares
shares
Apr. 25, 2019
USD ($)
Apr. 24, 2019
USD ($)
Jun. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2019
USD ($)
Dec. 31, 2019
$ / shares
shares
Basis Of Presentation And New Accounting Standards [Line Items]              
Proceeds from sale of business         $ 0 $ 5,637  
Reverse stock split effective date for trading purposes   Aug. 06, 2019          
Reverse stock split of common stock   0.02          
Reverse stock split of common stock description   Upon effectiveness, each 50 shares of issued and outstanding common stock were converted into one newly issued and outstanding share of common stock          
Common stock, par value (in dollars per share) | $ / shares   $ 0.001     $ 0.001   $ 0.001
Common stock, shares issued (in shares) | shares 50,000,000 50,000,000     4,273,857   3,880,588
Common stock, shares outstanding (in shares) | shares 50,000,000 50,000,000     4,273,857   3,880,588
Preferred stock, shares authorized (in shares) | shares 5,000,000 5,000,000     5,000,000   5,000,000
Common stock, reverse stock split, fractional shares issued | shares 0 0          
Sale of UK Subsidiary and Certain Assets [Member] | Loan and Security Agreement [Member]              
Basis Of Presentation And New Accounting Standards [Line Items]              
Proceeds from sale of business       $ 4,000      
Payments for principal, interest and fees       $ 1,700      
Sale of the Japanese Subsidiary and Certain Assets [Member] | Loan and Security Agreement [Member]              
Basis Of Presentation And New Accounting Standards [Line Items]              
Proceeds from sale of business     $ 3,000        
Payments for principal, interest and fees     $ 1,400