Fair Value Measurements - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		Jun. 30, 2018	Mar. 31, 2018
Carrying Value
ASSETS
Cash and cash equivalents	[1]	$ 26,544	$ 28,845
Restricted cash and cash equivalents		7,520	2,373
Total		34,064	31,218
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value
ASSETS
Cash and cash equivalents	[1]	26,544	28,845
Restricted cash and cash equivalents		7,520	2,373
Total		34,064	31,218
Significant Other Observable Inputs (Level 2) | Fair Value
ASSETS
Cash and cash equivalents	[1]	0	0
Restricted cash and cash equivalents		0	0
Total		0	0
Unobservable Inputs (Level 3) | Fair Value
ASSETS
Cash and cash equivalents	[1]	0	0
Restricted cash and cash equivalents		0	0
Total		$ 0	$ 0

[1] Cash equivalents consist primarily of money market funds.