Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)			3 Months Ended	6 Months Ended
	Nov. 09, 2017	Mar. 16, 2016	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
Cash, Uninsured Amount				$ 32,900,000
Cash, FDIC Insured Amount				250,000
Amortization of Debt Issuance Costs				107,000	$ 38,000
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Payment Of Revenue	$ 9,300,000
Professional Stop Loss [Member]
Summary Of Significant Accounting Policies [Line Items]
Health Care Organization, Patient Service Revenue				20,000
Medi-Cal Patients Stop Loss [Member]
Summary Of Significant Accounting Policies [Line Items]
Health Care Organization, Patient Service Revenue				$ 200,000
Warrant Liability [Member]
Summary Of Significant Accounting Policies [Line Items]
Risk free interest rate		1.13%			0.99%
Expected volatility rate		65.70%			61.70%
Share Price					$ 4.50	$ 5.93
Percentage For Down round financing		0.00%
Financial Liabilities Fair Value Disclosure					$ 1,500,000	$ 2,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		4 years 6 months			4 years 14 days
Warrant [Member]
Summary Of Significant Accounting Policies [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)					$ 1,333,333
Maximum
Summary Of Significant Accounting Policies [Line Items]
Management agreement, initial term				20 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Management agreement, initial term				10 years
APA ACO [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase In Government Revenue			$ 55,700,000
Estimated Revenue Percentage				100.00%