Stock-Based Compensation - Unvested Stock Option Awards (Details) $ / shares in Units, shares in Thousands	12 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares
Shares
Unvested at beginning of period (shares) | shares	17
Vested (shares) | shares	(17)
Unvested at end of period (shares) | shares	0
Weighted Average Grant Date Fair Value
Unvested at beginning of period (USD per share) | $ / shares	$ 15.80
Vested (USD per share) | $ / shares	15.80
Unvested at end of period (USD per share) | $ / shares	$ 0.00
Aggregate Grant Date Fair Value
Unvested at beginning of period	$ 275,000
Vested	(275,000)
Unvested at end of period	0
Unearned compensation	$ 0