EARNINGS (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
EARNINGS (LOSS) PER SHARE
Net (loss)/income	$ 434	$ 3,895	$ (18,913)	$ 10,929
Net income allocated to restricted stock, Basic	(12)	(63)		(176)
Net income allocated to restricted stock, Diluted	(13)	(63)		(176)
Net income/(loss) allocated to common shares, Basic	422	3,832	(18,913)	10,753
Net income/(loss) allocated to common shares, Diluted	$ 421	$ 3,832	$ (18,913)	$ 10,753
Basic Weighted-Average Shares Outstanding	11,991	11,879	11,953	11,826
Dilutive effect of stock options and ESPP	12	128		106
Dilutive effect of Notes		78		128
Diluted Weighted-Average Shares Outstanding	12,003	12,085	11,953	12,060
Earnings/(Loss) Per Share, Basic	$ 0.04	$ 0.32	$ (1.58)	$ 0.91
Earnings/(Loss) Per Share, Diluted	$ 0.04	$ 0.32	$ (1.58)	$ 0.89