Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 155,407
Charged to Costs and Expenses	158,922	$ 1,629,267
Balance at End of Period	198,449	155,407
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	155,000	666,000
Charged to Costs and Expenses	121,000	48,000
Charged to Other Accounts	17,000	0
Deductions	(95,000)	(559,000)
Balance at End of Period	$ 198,000	$ 155,000