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Note 9. Debt (Detail) (USD $)
 1 Months Ended 1 Months Ended 1 Months Ended 37 Months Ended
Sep. 30, 2012
May 31, 2011
May 31, 2010
Mar. 31, 2010
Dec. 31, 2008
Sep. 30, 2008
Sep. 30, 2009
Oct. 31, 2012
Subsequent Event [Member]
Mar. 31, 2010
Minimum [Member]
Mar. 31, 2010
Maximum [Member]
May 31, 2012
First Promissory Note Assumed [Member]
May 31, 2015
Second Promissory Note Assumed [Member]
Sep. 30, 2012
Bank Term Loan [Member]
Mar. 31, 2010
Maximum Revolving Credit Advances [Member]
Mar. 31, 2010
Acquisitions [Member]
Mar. 31, 2010
Working Capital Purposes [Member]
Line of Credit Facility, Covenant Terms   lesser of (i) $5 million and (ii) 80% of eligible receivables   lesser of (i) $5 million and (ii) 80% of eligible receivables lesser of (i)$3.0million and (ii)80% of eligible accounts receivable lesser of (i)$1.25million and (ii)80% of eligible accounts receivable                    
Line of Credit Facility, Maximum Borrowing Capacity         $ 3,000,000 $ 1,250,000               $ 5,000,000 $ 3,000,000 $ 5,000,000
Debt Instrument, Basis Spread on Variable Rate 1.75%       2.00% 1.00%     1.00% 1.25%            
Debt Instrument, Interest Rate, Stated Percentage     1.00%   8.00%           5.00% 5.00%        
Line of Credit Facility, Amount Outstanding 2,400,000           1,000,000                  
Debt Instrument, Description of Variable Rate Basis         3.25%                      
Maximum Out of Formula Borrowings if Available Borrowing is Less Than $5 Million   2,000,000   2,000,000                        
Line of Credit Facility, Commitment Fee Percentage       0.50%                        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage       0.25%                        
Line of Credit Maturity Date Extension Period   1 year                            
Debt Instrument, Face Amount 2,000,000   500,000                          
Term Loan Repayment Term 36 years                              
Long-term Debt 4,402,000                       1,700,000      
Debt Instrument, Decrease, Repayments               800,000                
Debt Instrument, Periodic Payment     42,000               8,000 7,000        
Noncash or Part Noncash Acquisition, Debt Assumed                     63,000 80,000        
Debt Instrument, Frequency of Periodic Payment     twelve equal installments                          
Capital Leases, Future Minimum Payments Due, Next Twelve Months 248,000                              
Capital Leases, Future Minimum Payments Due in Two Years 99,000                              
Capital Leases, Future Minimum Payments Due in Three Years $ 10,000