DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings per share basic
Net (loss)/Income	$ (42,603)	$ (22,548)	$ 6,094
Net income allocated to participating securities, basic			(97)
Dividends on Series A convertible preferred stock	(190)
Net income/(loss) allocated to common shares, Basic	$ (42,793)	$ (22,548)	$ 6,094
Basic Weighted-Average Shares Outstanding (in shares)	12,596	11,964	11,841
(Loss)/Income per share, Basic	$ (3.40)	$ (1.88)	$ 0.51
Earnings per share diluted
Net (loss)/Income	$ (42,603)	$ (22,548)	$ 6,094
Dividends on Series A convertible preferred stock	(190)
Net (loss)/income allocated to common shares, Diluted	$ (42,793)	$ (22,548)	$ 5,997
Basic Weighted-Average Shares Outstanding (in shares)	12,596	11,964	11,841
Dilutive effect of stock options and ESPP			103
Dilutive effect of Notes			96
Diluted Weighted-Average Shares Outstanding (in shares)	12,596	11,964	12,040
(Loss)/Income per share, Diluted	$ (3.40)	$ (1.88)	$ 0.50
Anti-dilutive shares (in shares)	1,700	1,300	3,000
Convertible Senior Notes [Member]
Interest rate (as a percent)			3.00%