Valuation and Qualifying Accounts and Reserves (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 267,264
Charged to Costs and Expenses	2,283,345	140,928	489,434
Balance at End of Period	665,962	267,264
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	267,000	134,000	100,000
Charged to Costs and Expenses	441,000	331,000	67,000
Charged to Other Accounts	1,000	0	34,000
Deductions	(43,000)	(198,000)	(67,000)
Balance at End of Period	666,000	267,000	134,000
Valuation allowance on deferred tax assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	7,667,000	7,835,000	9,835,000
Charged to Costs and Expenses	4,031,000	(209,000)	(2,000,000)
Charged to Other Accounts	(41,000)	41,000	0
Deductions	897,000	0	0
Balance at End of Period	$ 12,554,000	$ 7,667,000	$ 7,835,000