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Note 5. Acquisitions (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended
May 31, 2012
Sep. 30, 2011
Sep. 30, 2012
Jun. 30, 2012
MarketNet, Inc. [Member]
Customer Relationships [Member]
Jun. 30, 2012
MarketNet, Inc. [Member]
Noncompete Agreements [Member]
May 31, 2012
MarketNet, Inc. [Member]
Jun. 30, 2012
MarketNet, Inc. [Member]
Jun. 30, 2012
MarketNet, Inc. [Member]
Jun. 30, 2012
Magnetic Corporation [Member]
Customer Relationships [Member]
Jun. 30, 2012
Magnetic Corporation [Member]
Noncompete Agreements [Member]
Oct. 03, 2011
Magnetic Corporation [Member]
Oct. 03, 2010
Magnetic Corporation [Member]
Jun. 30, 2012
Magnetic Corporation [Member]
Business Acquisition, Cost of Acquired Entity, Cash Paid     $ 70     $ 20         $ 150    
Noncash or Part Noncash Acquisition, Debt Assumed           244              
Business Acquisition, Contingent Consideration, Potential Cash Payment           650         600    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)           204,331         166,666    
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 142 83       607           (100)  
Business Acquisition, Contingent Consideration, Shares Issuable (in Shares)           200,000   200,000       166,666  
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned           262           150  
Business Acquisition Contingent Stock Consideration Per Share (in Dollars per share)           $ 1.38              
Contingent Consideration Price Per Share (in Dollars per share)                       $ 0.90  
Business Acquisition, Contingent Consideration, at Fair Value                       600  
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill     $ 1,030 $ 440 $ 160   $ 600 $ 600 $ 350 $ 80     $ 430
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life             5 years           5 years