Earnings Per Share (Details) - shares		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stock options
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	613,243	577,500	613,243	921,970
Restricted Stock Units (RSUs)
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	480,323	0	400,546	934,819
Warrants | Private placement
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	6,160,000	6,160,000	6,160,000	6,160,000
Warrants | Public
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	9,823,072	9,823,072	9,823,072	9,823,072
Director | Restricted Stock
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	69,495	0	69,018	141,957

[1] SARs and Phantom Shares are payable in cash so will therefore have no impact on number of shares