Annual report pursuant to Section 13 and 15(d)

Capital Stock - Rights Offering 2018 (Details)

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Capital Stock - Rights Offering 2018 (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Nov. 19, 2018
Sale of stock        
Stock issuance costs   $ 317    
Preferred stock, stated value (in dollars per share) $ 0.05 $ 0.05 $ 0.05  
Series Y Convertible Preferred Stock        
Sale of stock        
Preferred stock conversion price per share $ 13.00   $ 13.00  
Common Stock        
Sale of stock        
Total number of shares issued   1,000,000 354,000  
2018 Rights Offering        
Sale of stock        
Rights offering amount       $ 20,000
Aggregate gross proceeds from issuance of common stock and preferred stock $ 20,000      
Stock issuance costs 300      
Net proceeds from issuance of stock $ 19,700      
Notice term of conversion blocker     61 days  
2018 Rights Offering | Series Y Convertible Preferred Stock        
Sale of stock        
Total number of shares issued 1,252.772      
Preferred stock, stated value (in dollars per share) $ 13,000   $ 13,000  
Number of shares issued for each share of convertible preferred stock that is converted 1,000   1,000  
Total number of shares of common stock issuable upon conversion 1,252,772   1,252,772  
Percentage of convertible preferred stock conversion blocker provision 19.99%   19.99%  
2018 Rights Offering | Common Stock        
Sale of stock        
Total number of shares issued 285,689