SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Jan. 31, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Income Taxes Paid	$ 0.0	$ 0.0
Proceeds from Income Tax Refunds	0.0	0.0
Unrecognized Tax Benefits	8.9		$ 8.8
Income Tax Examination, Penalties and Interest Accrued	0.5		0.4
Inventory Write-down	0.2		$ 0.0
Asset Impairment Charges	$ 0.0	$ 0.0
Minimum [Member] | Building and Building Improvements [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	5
Minimum [Member] | Fixtures And Equipment [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	2
Maximum [Member] | Building and Building Improvements [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	40 years
Maximum [Member] | Fixtures And Equipment [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	20years
Provision for Income Taxes [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Unrecognized Tax Benefits	$ 8.4
Cost of Sales [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting	20.00%