Earnings per Share - Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Numerator for basic and diluted EPS — net income (loss)	$ (7,573)	$ (15,386)
Denominator for basic EPS — weighted average number of shares (shares)	18,904,965	23,955,714
Add — dilutive effect of:
Restricted stock units	0	0
Denominator for diluted EPS — weighted average number of shares and dilutive potential shares (shares)	18,904,965	23,955,714
Earnings per share:
Basic (usd per share)	$ (0.40)	$ (0.64)
Diluted (usd per share)	$ (0.40)	$ (0.64)
Pro Forma
Add — dilutive effect of:
Denominator for diluted EPS — weighted average number of shares and dilutive potential shares (shares)	21,969,654	24,612,969
Cogent Partners, LP
Earnings per share:
Conditional consideration (shares)		334,048

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