AVERAGE SHARE INFORMATION (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017
Basic:
Weighted average common shares outstanding (in shares)	8,787,835	8,701,975	8,729,710	8,716,960
Diluted:
Weighted average common shares outstanding (in shares)	8,787,835	8,701,975	8,729,710	8,716,960
Dilutive potential common shares stock options (in shares)	150,125	80,622	157,053	68,875
Weighted average diluted shares outstanding (in shares)	8,937,960	8,782,597	8,886,763	8,785,835
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	338,489	746,274	392,609	734,155
Net Income (Loss) Attributable to Parent	$ 1,680,217	$ 9,640,033	$ 24,547,248	$ 41,749,452	$ 73,600,294
Earnings Per Share, Basic	$ 0.19	$ 1.11	$ 2.81	$ 4.79
Earnings Per Share, Diluted	$ 0.19	$ 1.10	$ 2.76	$ 4.75