Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Additional Information (Detail)

v3.7.0.1
Stock-based Compensation - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended
Feb. 09, 2017
Feb. 16, 2016
Feb. 15, 2016
Jun. 30, 2016
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Stock option awards               0       400,000
Weighted-average grant date fair value                       $ 0.82
Stock options vested               333,333        
Stock options forfeited               0        
Number of stock options, exercised               0        
Non-employee Directors [Member]                        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Annual retainer amount for the threshold of stock precluded from selling               $ 270,000        
2012 Equity Incentive Plan [Member] | Non-employee Directors [Member]                        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Stock option awards   80,000                    
Exercise price of plan   $ 0.84                    
2012 Equity Incentive Plan [Member] | Non-employee Directors [Member] | Restricted Stock [Member]                        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Restricted shares awarded to each non-employee director 40,000   40,000                  
Restricted shares vest in each quarter end               10,000 10,000 10,000 10,000 10,000
Restricted shares ending date               Under the Company's 2012 Equity Incentive Plan (the "2012 Plan"), of which, 10,000 restricted shares vest at the end of each calendar quarter in 2017, provided the recipient remains a director through the vesting date.        
2012 Equity Incentive Plan [Member] | Former Director [Member] | Restricted Stock [Member]                        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Restricted shares vest in each quarter end       20,000                
2012 Equity Incentive Plan [Member] | Scenario, Forecast [Member] | Non-employee Directors [Member] | Restricted Stock [Member]                        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Restricted shares vest in each quarter end         10,000 10,000 10,000