SHARE INCENTIVE PLANS (Share Option Plans) (Details) - shares	Jul. 25, 2019	Sep. 30, 2019
Share incentive plans
Common stock, capital shares reserved for future issuance (in shares)		8,774,730
Fourth Restated Plan
Share incentive plans
Common stock, capital shares reserved for future issuance (in shares)	1,960,000
Number of additional shares authorized (in shares)	6,427,000