Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Income Taxes [Line Items]
Tax net operating loss can be carried forward		20 years
Tax payments		$ 1,524,000	$ 4,000
Internal Revenue Service
Schedule Of Income Taxes [Line Items]
Tax payments	$ 1,200,000
Internal Revenue Service | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years		2010
Internal Revenue Service | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years		2013
U.S. federal
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	0	$ 0
U.S. federal | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years		2014
U.S. federal | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years		2016
States
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	1,000,000	$ 1,000,000
Tax payments	$ 300,000
States | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years		2012
States | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years		2016