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Income Taxes, Unrecognized Tax Benefits (Details) - USD ($)
 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Unrecognized tax benefits [Roll Forward]      
Balance at beginning of period $ 1,181,000 $ 1,117,000 $ 540,000
Additions based on tax positions related to the current year 141,000 57,000 359,000
Additions for tax positions of prior year 106,000 217,000 336,000
Reductions for tax positions of prior year 0 (210,000) (118,000)
Settlements (336,000) 0 0
Balance at end of period 1,092,000 1,181,000 1,117,000
Unrecognized tax benefits that would impact effective tax rate 840,000 678,000 958,000
Recognized interest and penalties 51,000 34,000 $ (56,000)
Interest and penalties accrued $ 141,000 $ 90,000