For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies Concentration of Credit Risk, Significant Customers and Channel Partners) (Details)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Accounts Receivable [Member] \| Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	34.00%	39.00%
Accounts Receivable [Member] \| Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	33.00%	21.00%
Accounts Receivable [Member] \| Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		10.00%
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	65.00%	67.00%	64.00%
Product Concentration Risk [Member] \| Sales Revenue, Product Line [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	66.00%	70.00%	70.00%