COMMITMENTS AND CONTINGENCIES: (Details) - Continuing operations - Operating lease and licensing agreements $ in Millions	6 Months Ended
Sep. 30, 2018 USD ($)
Commitments
Term of future commitment for lease payments under noncancellable operating leases (in years)	7 years
Contractual obligation	$ 52.8

Term of the unrecognized unconditional purchase obligation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration