Quarterly report pursuant to Section 13 or 15(d)

Subsequent event (Details)

v3.4.0.3
Subsequent event (Details) - Stock Incentive Plan [Member] - $ / shares
 1 Months Ended 3 Months Ended
May. 11, 2016
Mar. 31, 2016
Mar. 31, 2015
Subsequent Event [Line Items]      
Options granted  
Options granted, exercise price    
Subsequent Event [Member] | Independent Directors [Member]      
Subsequent Event [Line Items]      
Options granted 77,000    
Options granted, exercise price $ 2.89    
Expiration period 10 years    
Vesting period 1 year    
Subsequent Event [Member] | Officers and Employees [Member]      
Subsequent Event [Line Items]      
Options granted 150,000    
Options granted, exercise price $ 2.89    
Expiration period 10 years    
Vesting period 6 months