Acquisition (Details Textual) (USD $)	Jan. 31, 2013
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net	$ 1,833,000
Business Acquisition, Cost of Acquired Entity, Cash Paid	1,123,000
Business Acquisition Cash Placed In Escrow	400,000
Business Acquisition Contingent Purchase Price Liability	310,000
Business Acquisition Contingent Purchase Price Liability Maximum	1,000,000
Business Acquisition Contingent Purchase Price Liability Fair Value Estimated	310,000
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment	700,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	1,749,000
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities	$ 616,000