Quarterly report pursuant to Section 13 or 15(d)

Equity - Additional Information (Details)

v3.7.0.1
Equity - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 02, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Restricted Stock Units          
Class Of Stock [Line Items]          
Restricted stock units awarded       104,000  
Compensation expense   $ 89,000 $ 0 $ 135,000 $ 0
Estimated sharebased compensation expense for remainder of 2017   161,000   161,000  
Estimated sharebased compensation expense for 2018   285,000   285,000  
Estimated sharebased compensation expense for 2019   212,000   212,000  
Estimated sharebased compensation expense for 2020   $ 58,000   $ 58,000  
2017 Equity Incentive Plan | Restricted Stock Units          
Class Of Stock [Line Items]          
Restricted stock units awarded 104,000        
2017 Equity Incentive Plan | Restricted Stock Units | Employees          
Class Of Stock [Line Items]          
Restricted stock units awarded 53,000        
2017 Equity Incentive Plan | Restricted Stock Units | Employees | Vest in 2017          
Class Of Stock [Line Items]          
Restricted stock units expected to vest during period 9,000        
2017 Equity Incentive Plan | Restricted Stock Units | Employees | Vest in 2018          
Class Of Stock [Line Items]          
Restricted stock units expected to vest during period 24,000        
2017 Equity Incentive Plan | Restricted Stock Units | Employees | Vest in 2019          
Class Of Stock [Line Items]          
Restricted stock units expected to vest during period 20,000        
2017 Equity Incentive Plan | Restricted Stock Units | Officers          
Class Of Stock [Line Items]          
Restricted stock units awarded 51,000        
2017 Equity Incentive Plan | Restricted Stock Units | Officers | Vest on June 2, 2018          
Class Of Stock [Line Items]          
Restricted stock units expected to vest during period 17,000        
2017 Equity Incentive Plan | Restricted Stock Units | Officers | Vest on June 2, 2019          
Class Of Stock [Line Items]          
Restricted stock units expected to vest during period 17,000        
2017 Equity Incentive Plan | Restricted Stock Units | Officers | Vest on June 2, 2020          
Class Of Stock [Line Items]          
Restricted stock units expected to vest during period 17,000        
2017 Equity Incentive Plan | Maximum          
Class Of Stock [Line Items]          
Maximum number of shares of common stock reserved for issuance under plan   1,250,000   1,250,000