Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($)	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 665,962
Charged to Costs and Expenses	1,629,267	$ 2,283,345
Balance at End of Period	155,407	665,962
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	666,000	267,000
Charged to Costs and Expenses	48,000	441,000
Charged to Other Accounts	0	1,000
Deductions	(559,000)	(43,000)
Balance at End of Period	$ 155,000	$ 666,000