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Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 15, 2014
Jul. 31, 2018
Nov. 30, 2017
Apr. 30, 2017
Feb. 26, 2017
Oct. 29, 2014
Feb. 15, 2011
Feb. 26, 2017
Nov. 27, 2016
Aug. 28, 2016
Feb. 26, 2017
Feb. 28, 2016
 [1]
May 29, 2016
May 30, 2016
Number of Proprietary Platforms         2     2     2      
Debt Issuance Costs, Current, Net         $ 60,000     $ 60,000     $ 60,000      
Debt Issuance Costs, Noncurrent, Net         216,000     216,000     216,000      
Loss Contingency, Loss in Period               2,100,000     2,600,000      
Payments of Debt Extinguishment Costs                 $ 233,000   233,000    
Cumulative Effect of New Accounting Principle in Period of Adoption [2]         $ 623,000     $ 623,000     623,000      
Reclassification of Debt Issuance Costs from Assets to Reduction in Liabilities [Member] | May 29, 2016 [Member]                            
Prior Period Reclassification Adjustment                   $ 817,000        
Reclassification of Debt Issuance Costs from Other Current Assets to Reduction in Current Portion of Long-term Debt [Member] | May 29, 2016 [Member]                            
Prior Period Reclassification Adjustment                   175,000        
Reclassification of Debt Issuance Costs from Other Noncurrent Assets to Reduction in Long-term Debt [Member] | May 29, 2016 [Member]                            
Prior Period Reclassification Adjustment                   $ 642,000        
Reclassifiction of Stock-based Compensation Excess Tax Benefits from Financing Activities to Operating Activities [Member]                            
Prior Period Reclassification Adjustment                     $ 90,000      
Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member] | Ophthalmic [Member] | HA Based Biomaterials [Member]                            
Concentration Risk, Percentage                         55.00%  
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Orthopedic [Member] | HA Based Biomaterials [Member]                            
Concentration Risk, Percentage                         20.00%  
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Other/Non-HA [Member] | HA Based Biomaterials [Member]                            
Concentration Risk, Percentage                         25.00%  
Windset [Member]                            
Investment Ownership Percentage         26.90%     26.90%     26.90%      
Customer Relationships [Member] | Minimum [Member]                            
Finite-Lived Intangible Asset, Useful Life                     12 years      
Customer Relationships [Member] | Maximum [Member]                            
Finite-Lived Intangible Asset, Useful Life                     13 years      
Retained Earnings [Member]                            
Cumulative Effect of New Accounting Principle in Period of Adoption [2]         $ 423,000     $ 423,000     $ 423,000      
Retained Earnings [Member] | Adjustment for Unrecognized Excess Tax Benefits [Member]                            
Cumulative Effect of New Accounting Principle in Period of Adoption                           $ 549,000
Retained Earnings [Member] | Adjustment for Forfeitures Treatment [Member]                            
Cumulative Effect of New Accounting Principle in Period of Adoption                           (126,000)
Additional Paid-in Capital [Member]                            
Cumulative Effect of New Accounting Principle in Period of Adoption [2]         200,000     200,000     200,000      
Additional Paid-in Capital [Member] | Adjustment for Forfeitures Treatment [Member]                            
Cumulative Effect of New Accounting Principle in Period of Adoption                           200,000
Windset [Member]                            
Investment Ownership Percentage 26.90%                          
Apio [Member]                            
Estimated Litigation Liability         1,300,000     $ 1,300,000     $ 1,300,000      
Apio [Member] | Civil and Administrative Actions [Member]                            
Payments for Legal Settlements         $ 155,000                  
Apio [Member] | Windset [Member]                            
Payments to Acquire Investments $ 11,000,000                          
Investment Ownership Percentage         60.00%     60.00%     60.00%      
Apio [Member] | Windset [Member] | Common Stock [Member]                            
Investment In Non Public Company Shares 68           201              
Payments to Acquire Investments             $ 201              
Apio [Member] | Windset [Member] | Senior B Preferred Stock [Member]                            
Investment In Non Public Company Shares           70,000 150,000              
Payments to Acquire Investments           $ 7,000,000 $ 15,000,000              
Apio [Member] | Windset [Member] | Junior Preferred Shares [Member]                            
Investment In Non Public Company Shares 51,211                          
Payments to Acquire Investments $ 11,000,000                          
The Reporting Entity and Labor Contractor [Member] | Civil and Administrative Actions [Member]                            
Payments for Legal Settlements         $ 310,000                  
The Reporting Entity and Labor Contractor [Member] | Civil and Administrative Actions [Member] | Scenario, Forecast [Member]                            
Payments for Legal Settlements   $ 1,800,000 $ 1,800,000 $ 2,400,000                    
Prepaid Expenses and Other Current Assets [Member]                            
Debt Issuance Costs, Line of Credit Arrangements, Net         120,000     $ 120,000     $ 120,000      
Other Assets [Member]                            
Debt Issuance Costs, Line of Credit Arrangements, Net         431,000     431,000     431,000      
Other Accrued Liabilities [Member]                            
Estimated Litigation Liability         $ 3,200,000     $ 3,200,000     $ 3,200,000      
Deferred Taxes [Member] | Adjustment for Forfeitures Treatment [Member]                            
Cumulative Effect of New Accounting Principle in Period of Adoption                           $ (74,000)
[1] See Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies for a discussion of accounting principles adopted during the period.
[2] See Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies for a discussion of accounting guidance adopted during the period.