Quarterly report pursuant to Section 13 or 15(d)

Stockholders' equity (Subsequent Events) (Details)

Stockholders' equity (Subsequent Events) (Details) (Subsequent Event [Member], USD $)
0 Months Ended
Jul. 02, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]  
Options issued 75,000
Number of employees to whom options are issued 3
Average exercise price $ 2.36
Vesting period 3 years
Expiration period 10 years