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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Income Tax Disclosure [Line Items]      
Statutory federal tax $ (7,400) $ (8,675)  
State income taxes, net of federal benefit (439) (1,480)  
Incentive stock option expense (41) 681  
Other permanent differences (91) 93  
Restricted stock shortfall/windfall (437) (435)  
Prior-year adjustments 165  
Total income tax (benefit) expense $ 2,402 $ 688  
Statutory federal tax, percent 21.00% 21.00% 35.00%
State income taxes, net of federal benefit, percent 1.00% 4.00%  
Incentive stock option expense, percent 0.00% (2.00%)  
Other permanent differences, percent 0.00% 0.00%  
Restricted stock shortfall/windfall, percent 1.00% 1.00%  
Prior-year adjustments, percent 0.00% 0.00%  
Total income tax expense, percent (7.00%) (2.00%)  
Federal [Member]      
Income Tax Disclosure [Line Items]      
Change in valuation allowance $ 9,440 $ 9,819  
Change in valuation allowance, percent (27.00%) (24.00%)  
State [Member]      
Income Tax Disclosure [Line Items]      
Change in valuation allowance $ 1,205 $ 685  
Change in valuation allowance, percent (3.00%) (2.00%)