Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 198,449
Charged to Costs and Expenses	46,191	$ 158,922
Balance at End of Period	349,058	198,449
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	198,000	155,000
Charged to Costs and Expenses	234,000	121,000
Charged to Other Accounts	0	17,000
Deductions	(83,000)	(95,000)
Balance at End of Period	$ 349,000	$ 198,000