Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Shareholders' Equity and Capital Stock - addl information (Details)
1 Months Ended 3 Months Ended 6 Months Ended 15 Months Ended
May 31, 2016
USD ($)
Feb. 29, 2016
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
$ / shares
shares
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
item
shares
Jun. 30, 2015
USD ($)
Mar. 31, 2016
$ / shares
shares
Jun. 30, 2016
CAD / shares
Jun. 30, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
$ / shares
shares
Stockholder's Equity Note [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period           16,620          
Stock Issued During Period, Shares, New Issues       108,000              
Share Price | (per share)   $ 0.50   $ 0.65       $ 0.65 CAD 0.66    
Payments Of Stock Issuance Costs | $           $ 767,000          
Stock Issued During Period, Value, New Issues | $ $ 20,000     $ 164,979   $ 5,716,000          
Threshold of combined service and age | item           65          
Percent or RSUs that vest           186,733          
Minimum Service For RSU Plan           5 years          
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Number                   8,546,602 9,974,407
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number                   7,323,880  
Stock based compensation | $     $ 200,000   $ 300,000 $ 440,000 $ 457,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $           400,000          
Proceeds from Stock Options Exercised | $           $ 9,000 $ 408,000        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period               0      
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                   $ 1.06 $ 1.71
Capital Stock                      
Stockholder's Equity Note [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period           16,620          
Stock Issued During Period, Shares, New Issues   12,900,000       13,085,979          
Stock Issued During Period, Value, New Issues | $   $ 5,900,000       $ 5,716,000          
In Money Stock Option [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Number                   0  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options | $                   $ 300,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition           9 months 18 days          
Restricted Stock Units (RSUs) [Member]                      
Stockholder's Equity Note [Line Items]                      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options | $                   $ 300,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition           1 year 1 month 6 days          
Restricted Stock Units (RSUs) [Member] | Capital Stock                      
Stockholder's Equity Note [Line Items]                      
Number of securities called by each unit                   1  
Grant Date [Member] | Employee Stock Option [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           10.00%          
Four and One Half Months After Grant [Member] | Employee Stock Option [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           22.00%          
Nine Months After Grant [Member] | Employee Stock Option [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           22.00%          
Thirteen and One Half Months After Grant [Member] | Employee Stock Option [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           22.00%          
Eighteen Months After Date Of Grant [Member] | Employee Stock Option [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           24.00%          
First Anniversary [Member] | Restricted Stock Units (RSUs) [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           50.00%          
Second Anniversary [Member] | Restricted Stock Units (RSUs) [Member]                      
Stockholder's Equity Note [Line Items]                      
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Percentage           50.00%