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OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
CAD
Dec. 31, 2016
JPY (¥)
Dec. 31, 2016
USD ($)
Dec. 31, 2016
EUR (€)
Dec. 31, 2016
CHF (SFr)
Dec. 31, 2015
CAD
Dec. 31, 2015
JPY (¥)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
EUR (€)
Dec. 31, 2015
CHF (SFr)
Dec. 31, 2013
USD ($)
Allowance for Doubtful Accounts Receivable [Roll Forward]                            
Balances at beginning of period $ 189,000 $ 216,000 $ 209,000                      
Additions - charged to expense 163,000 83,000 143,000                      
Deductions - write offs, net of recoveries (115,000) (110,000) (136,000)                      
Balances at end of period 237,000 189,000 216,000                      
Cash and cash equivalents     5,855,000 CAD 26,477 ¥ 1,252,221 $ 10,794,000 € 2,778,614 SFr 172,743 CAD 26,477 ¥ 1,252,221 $ 6,890,000 € 1,779,910 SFr 127,507 $ 6,016,000
Inventory, Gross [Abstract]                            
Raw materials           10,807,000         8,531,000      
Work in process           3,820,000         2,839,000      
Finished goods           7,087,000         6,122,000      
Allowance for excess or obsolete inventory           (1,319,000)         (1,391,000)      
Inventories, net           $ 20,395,000         $ 16,101,000      
Upfront license fees 0 0 3,000,000                      
Advertising expense $ 200,000 $ 100,000 $ 100,000                      
Building | Minimum                            
Inventory, Gross [Abstract]                            
Property plant and equipment, useful life 10 years                          
Building | Maximum                            
Inventory, Gross [Abstract]                            
Property plant and equipment, useful life 20 years                          
Machinery and equipment | Minimum                            
Inventory, Gross [Abstract]                            
Property plant and equipment, useful life 3 years                          
Machinery and equipment | Maximum                            
Inventory, Gross [Abstract]                            
Property plant and equipment, useful life 15 years                          
Leasehold and building improvements | Minimum                            
Inventory, Gross [Abstract]                            
Property plant and equipment, useful life 7 years                          
Leasehold and building improvements | Maximum                            
Inventory, Gross [Abstract]                            
Property plant and equipment, useful life 15 years                          
Customer Concentration Risk | Accounts Receivable | Henry Schein                            
Property, Plant and Equipment [Line Items]                            
Concentration risk, percentage 16.00%                          
Customer Concentration Risk | Accounts Receivable | Merck                            
Property, Plant and Equipment [Line Items]                            
Concentration risk, percentage 11.00% 13.00%                        
Customer Concentration Risk | Accounts Receivable | Eli Lilly                            
Property, Plant and Equipment [Line Items]                            
Concentration risk, percentage 15.00% 20.00%