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Note 6 - Commitments and Contingencies (Detail) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2011
Jan. 31, 2011
Jul. 31, 2010
May 31, 2010
Sep. 30, 2005
Apr. 03, 2011
Dec. 31, 2012
Dec. 31, 2011
May 25, 2012
Jun. 01, 2011
Apr. 21, 2011
Nov. 30, 2009
Unrecorded Unconditional Purchase Obligation             $ 457,000          
Royalty Expense             1,000 5,000        
Employment Contract Term             1 year          
Number Of Exigent Contracts Adjusted         3              
Loss Contingency, Estimate of Possible Loss         1,400,000              
Loss Contingency, Settlement Agreement, Consideration                 125 2,700,000 2,730,000  
Loss Contingency, Loss in Period           2,730,000            
Contingency Settlement, Interest Rate                   2.625%    
Loss Contingency, Damages Sought, Value 60,000,000   1,100,000 1,500,000                
Litigation Settlement, Expense   1,100,000                    
Litigation Settlement, Covered By Insurance   1,075,000                    
Underfunding Liability                       452,000
Settlement Agreement Payable                       520,000
Settlement Agreement, Monthly Installment Amount                       43,000
Community Development Block Grant [Member]
                        
Received To Date Under Grant 480,000             480,000        
Minimum Full Time Employees Required               30        
Percentage Of Positions Required To Be Made Available To Low Or Moderate Income Families               0.51        
Employment Requirement Term               3 years        
Minimum Required Equipment And Working Capital Investment               1,000,000        
Investment Requirement Term               3 years        
Mississippi Rural Impact Fund Grant [Member]
                        
Received To Date Under Grant 150,000             150,000        
Minimum Full Time Employees Required               30        
Percentage Of Positions Required To Be Made Available To Low Or Moderate Income Families               0.51        
Employment Requirement Term               2 years        
Minimum Required Equipment And Working Capital Investment               1,000,000        
Investment Requirement Term               3 years        
June 8, 2011 [Member]
                        
Contingency Settlement, Principal Payment Due                   1,000,000    
December 1, 2011 [Member]
                        
Contingency Settlement, Principal Payment Due                   567,000    
June 1, 2012 [Member]
                        
Contingency Settlement, Principal Payment Due                   567,000    
December 1, 2012 [Member]
                        
Contingency Settlement, Principal Payment Due                   566,000    
Workers’ Compensation Self-Insured Trust [Member]
                        
Underfunding Liability                       $ 19,100,000