Condensed Consolidated Statements of Shareholders' Equity - USD ($)	Common stock	Treasury stock	Additional paid-in capital	Retained earnings/(Accumulated deficit)	Total
Balance at Mar. 31, 2016	$ 580,575	$ (20,943,816)	$ 848,179,471	$ 157,783,007	$ 985,599,237
Balance (in shares) at Mar. 31, 2016	58,057,493
Increase (Decrease) in Shareholders' Equity
Net loss				(1,291,121)	(1,291,121)
Restricted share award issuances	$ 2,570		(2,570)
Restricted share award issuances (in shares)	256,950
Stock-based compensation			1,421,636		1,421,636
Purchase of treasury stock		(11,853,983)			(11,853,983)
Balance at Jun. 30, 2016	$ 583,145	(32,797,799)	849,598,537	156,491,886	973,875,769
Balance (in shares) at Jun. 30, 2016	58,314,443
Balance at Mar. 31, 2017	$ 583,422	(33,897,269)	852,974,373	156,341,192	976,001,718
Balance (in shares) at Mar. 31, 2017	58,342,201
Increase (Decrease) in Shareholders' Equity
Net loss				(6,689,970)	(6,689,970)
Restricted share award issuances	$ 2,685		(2,685)
Restricted share award issuances (in shares)	268,464
Stock-based compensation			1,524,217		1,524,217
Purchase of treasury stock		(1,084,902)			(1,084,902)
Balance at Jun. 30, 2017	$ 586,107	$ (34,982,171)	$ 854,495,905	$ 149,651,222	$ 969,751,063
Balance (in shares) at Jun. 30, 2017	58,610,665