Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Restricted Stock (Details)

v3.8.0.1
Shareholders' Equity - Restricted Stock (Details) - Restricted shares
$ in Thousands
3 Months Ended
Mar. 07, 2018
USD ($)
shares
Jan. 29, 2018
USD ($)
shares
Jan. 22, 2018
USD ($)
shares
Jan. 12, 2018
USD ($)
shares
Mar. 31, 2018
USD ($)
installment
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares | shares 125,000 25,000 245,000 1,460,000 1,855,000
Fair Value | $ $ 425 $ 78 $ 762 $ 4,687 $ 5,952
Number of vesting installments | installment         4