SHAREHOLDERS' EQUITY - Share Capital - Shares Authorized (Details) - $ / shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Share capital
Share capital, shares authorized, unlimited	Unlimited	Unlimited
Share capital, par value (in CAD per share)	$ 0	$ 0

Indicates that the number of common shares permitted to be issued by an entity's charter and bylaws is unlimited. The acceptable value is "Unlimited".

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_CommonStockSharesAuthorizedUnlimited
Namespace Prefix:	us-gaap_
Data Type:	us-types:authorizedUnlimitedItemType
Balance Type:	na
Period Type:	duration