ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share
Net income (loss) attributable to common stockholders	$ 17,866	$ 1,420	$ 17,873	$ (21,767)
Denominator:
Denominator for basic net income (loss) per share - weighted average outstanding shares	49,789,892	44,806,219	49,124,056	45,025,471
Effect of dilutive securities:
Stock options and restricted stock	3,991,026	3,348,043	4,062,563	0
Denominator for diluted net income (loss) per share - weighted-average outstanding shares	53,780,918	48,154,262	53,186,619	45,025,471
Net income (loss) attributable to common stockholders per share - basic	$ 0.36	$ 0.03	$ 0.36	$ (0.48)
Net income (loss) attributable to common stockholders per share -diluted	$ 0.33	$ 0.03	$ 0.34	$ (0.48)