Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 349,000
Charged to Costs and Expenses	(126,000)	$ (95,000)
Balance at End of Period	345,000	349,000
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	349,000	198,000
Charged to Costs and Expenses	13,000	234,000
Deductions	(17,000)	(83,000)
Balance at End of Period	$ 345,000	$ 349,000