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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - USD ($)
6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Increase (Decrease) in Shareholders' Equity [Roll Forward]    
Proceeds from exercise of stock options (in shares) 115,819 33,702
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation $ 0  
Proceeds from exercise of stock options, tax benefits   $ (565,162)
Common stock repurchases (in shares) 58,728 95,703
Adjustments Related to Tax Withholding for Share-based Compensation $ 0 $ 284,221