Net Earnings (Loss) Per Share - Schedule of Antidilutive Shares (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)	2,736,754
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)	654,016
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)	2,066,624
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)	16,114
Predecessor
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)		211,363	669,878
Predecessor | Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)		0	26,527
Predecessor | Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)		0	0
Predecessor | Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive instruments (in shares)		211,363	643,351