Stock Options and Restricted Shares - Outstanding Non-vested Stock Options (Details)	6 Months Ended
	Sep. 30, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Non-vested at March 31, 2016 (shares)	205,900
Granted (shares)	0
Vested (shares)	(44,300)
Forfeited (shares)	(2,000)
Non-vested at September 30, 2016 (shares)	159,600