Concentration Risk, Number of Banking Institutions in Which Funds are Deposited

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	2 Months Ended	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2018 bank	Mar. 31, 2017 USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Adjustment to adopt ASU 2016-09			$ 0
Minimum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Estimated useful lives of property and equipment		3 years
Maximum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Estimated useful lives of property and equipment		7 years
Credit Concentration Risk
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of banking institutions \| bank		3
Accumulated Deficit
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09			(122)
Additional Paid in Capital
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09			122
Accounting Standards Update 2016-09 \| Accumulated Deficit
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09			(100)
Accounting Standards Update 2016-09 \| Additional Paid in Capital
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09			$ 100