Description of the Business and Significant Accounting Policies (Details 4) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Commissions
Commission expense	$ 26,900,000	$ 22,300,000	$ 9,900,000
Leases
Lease rent expenses	3,900,000	2,600,000	1,600,000
Advertising Expense
Advertising expenses	6,000,000	3,700,000	2,000,000
Software development for sale or lease
Description of the Business and Significant Accounting Policies
Total amortization expenses	118,000	334,000	48,000
Capitalized amount			500,000
Software development for internal use
Description of the Business and Significant Accounting Policies
Total amortization expenses	278,000
Capitalized amount	2,800,000	1,600,000
Expected future amortization for capitalized computer software costs developed for internal use
2014	555,000
2015	555,000
2016	555,000
2017	555,000
2018	278,000
Total	$ 2,498,000