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CAPITAL STOCK - Summary of Restricted Stock Activity (Details) - Restricted Shares - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of shares
Beginning balance (in shares)	326,545	219,317	161,824
Grants (in shares)	439,747	223,884	133,352
Vested (in shares)	(148,414)	(90,926)	(69,795)
Cancellations (in shares)	(24,537)	(25,730)	(6,064)
Ending balance (in shares)	593,341	326,545	219,317
Weighted- average grant date fair value
Beginning balance (usd per share)	$ 14.63	$ 17.12	$ 15.35
Grants (usd per share)	9.25	13.25	18.32
Vested (usd per share)	14.54	17.14	15.39
Cancellations (usd per share)	13.97	14.96	16.07
Ending balance (usd per share)	$ 10.70	$ 14.63	$ 17.12
Total unrecognized compensation expense remaining (in thousands)	$ 4,199
Weighted-average years expected to be recognized over	1 year 7 months 6 days

X

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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