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Basis of Presentation and New Accounting Standards (Details)
$ / shares in Units, $ in Millions
Aug. 06, 2019
shares
Aug. 05, 2019
$ / shares
shares
Apr. 25, 2019
USD ($)
Apr. 24, 2019
USD ($)
Mar. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Mar. 31, 2019
shares
Basis Of Presentation And New Accounting Standards [Line Items]              
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     3,880,588 3,880,588  
Common stock, shares outstanding (in shares) | shares 50,000,000 50,000,000     3,880,588 3,880,588  
Preferred stock, shares authorized (in shares) | shares 5,000,000 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]              
Cash proceeds from sale of subsidiary | $       $ 4.0      
Payments for principal, interest and fees | $       $ 1.7      
Sale of the Japanese Subsidiary and Certain Assets [Member] | Loan and Security Agreement [Member]              
Basis Of Presentation And New Accounting Standards [Line Items]              
Cash proceeds from sale of subsidiary | $     $ 3.0        
Payments for principal, interest and fees | $     $ 1.4