INCOME (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Per Share, Basic and Diluted [Abstract]
Net income (loss) for basic and diluted income (loss) per common share	$ 4,038	$ (13,413)	$ 14,268	$ (12,109)
Shares [Abstract]
Weighted-average common shares outstanding - basic (in shares)	37,984,316	30,975,338	37,230,831	21,827,082
Weighted-average common shares outstanding - diluted (in shares)	38,286,702	30,975,338	37,365,371	21,827,082
Net income (loss) per common share - basic and diluted (in dollars per share)	$ 0.11	$ (0.43)	$ 0.38	$ (0.55)
Securities excluded from computation of diluted loss per share (in shares)			447,500
Restricted Stock Units [Member]
Shares [Abstract]
Effect of dilutive securities (in shares)	19,222	0	16,555	0
Stock Options [Member]
Shares [Abstract]
Effect of dilutive securities (in shares)	283,164	0	100,975	0
Warrants [Member]
Shares [Abstract]
Effect of dilutive securities (in shares)	0	0	17,010	0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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