Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity and Capital Stock - addl information (Details)

v3.19.2
Shareholders' Equity and Capital Stock - addl information (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 30, 2018
shares
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2019
$ / shares
Jun. 30, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
$ / shares
shares
Dec. 17, 2018
shares
Sep. 25, 2018
shares
Stockholder's Equity Note [Line Items]                
Vesting period   5 years            
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Intrinsic Value | $         $ 2,246      
Common Stock Shares Issued         159,935,563 159,729,403 32,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period   206,160            
Share Price | $ / shares       $ 1.24        
Payments Of Stock Issuance Costs | $     $ 4          
Exercise of stock options | $   $ 134            
Number of RSUs Vested   9,053            
Percent or RSUs that vest   9,053            
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Number         9,425,452 9,731,612    
stock options exercisable         5,907,261      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number         5,907,261      
Stock based compensation | $   $ 370 566          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $   100            
Proceeds from Stock Options Exercised | $   $ 134 $ 113          
Granted, Options   0            
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares         $ 1.00 $ 1.00    
Capital Stock                
Stockholder's Equity Note [Line Items]                
Common Stock Shares Issued         159,935,563 159,729,403    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period   206,160            
Exercise of stock options | $   $ 190            
Warrants                
Stockholder's Equity Note [Line Items]                
Number of securities called by each warrant               13,062,878
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares         $ 0.01      
In Money Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Number         9,425,452      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options | $         $ 900      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition   1 year 10 months 24 days            
Restricted Stock Units (RSUs) [Member]                
Stockholder's Equity Note [Line Items]                
Number of RSUs Vested 62,000              
Percent or RSUs that vest 62,000              
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options | $         $ 400      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition   1 year 1 month 6 days            
Granted, Options   0 0          
Restricted Stock Units (RSUs) [Member] | Capital Stock                
Stockholder's Equity Note [Line Items]                
Number of securities called by each warrant         1      
First Anniversary [Member]                
Stockholder's Equity Note [Line Items]                
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage   33.30%            
First Anniversary [Member] | Employee Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Stock Option Vesting Period   3 years            
Second Anniversary [Member]                
Stockholder's Equity Note [Line Items]                
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage   33.30%            
Third Anniversary (Member)                
Stockholder's Equity Note [Line Items]                
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage   33.40%