Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.19.1
Income Taxes - Additional Information (Detail) - USD ($)
9 Months Ended 12 Months Ended
Dec. 31, 2017
Mar. 31, 2019
Mar. 31, 2018
Income Taxes [Line Items]      
Valuation allowance   $ 4,917,000 $ 1,074,000
Deferred Tax Assets, gross   3,898,000  
Liability unrecognized tax benefits   $ 0 0
Percentage of corporate income tax rate 35.00% 21.00%  
Income tax benefit from remeasurement of deferred tax assets and liabilities     971,000
One-time transition tax on accumulated foreign earnings     185,000
Tax related to global intangible low-taxed income   $ 11,000  
Foreign derived intangible income (FDII) effective tax rate 13.125%    
Incremental U.S. tax savings on foreign derived intangible income   69,000  
International Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Net operating loss   $ 200,000  
Earliest Tax Year [Member] | International Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Net operating loss, expiration date   Mar. 31, 2021  
Open tax year   2015  
Earliest Tax Year [Member] | State Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year   2014  
Earliest Tax Year [Member] | Federal Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year   2015  
Latest Tax Year [Member] | International Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Net operating loss, expiration date   Mar. 31, 2023  
Open tax year   2018  
Latest Tax Year [Member] | State Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year   2018  
Latest Tax Year [Member] | Federal Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year   2018  
Energy Steel [Member] | State Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Net operating loss   $ 4,279,000  
Other Assets [Member]      
Income Taxes [Line Items]      
Deferred income tax asset foreign   37,000 $ 15,000
Assets Held for Sale [Member] | State Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Deferred Tax Assets, gross   126,000  
Net operating loss carryforwards, valuation allowance   34,000  
Investment Tax Credit Carryforward [Member]      
Income Taxes [Line Items]      
Deferred income taxes include the impact of state investment tax credits   275,000  
State investment tax credits with an unlimited carryforward period   $ 794,000  
Investment Tax Credit Carryforward [Member] | Maximum [Member]      
Income Taxes [Line Items]      
Expiration date of state investment tax credits   Mar. 31, 2033  
Investment Tax Credit Carryforward [Member] | Minimum [Member]      
Income Taxes [Line Items]      
Expiration date of state investment tax credits   Mar. 31, 2020