Quarterly report pursuant to Section 13 or 15(d)

Business Combinations (Details Textual)

v2.4.0.8
Business Combinations (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Business Combinations (Textual) [Abstract]      
Goodwill $ 100,929,000   $ 97,238,000
Amortization of intangible assets acquired 2,061,000 1,823,000  
Decrease in general and administrative expense related to the direct acquisition costs 12,280,000 13,966,000  
Grass Technologies [Member]
     
Business Combinations (Textual) [Abstract]      
Acquisition date of entity Feb. 02, 2013    
Inventory purchase commitment 2,400,000    
Purchase price paid in cash to acquire entity 21,000,000    
Direct cost associated with entity acquisition 624,000    
Goodwill 7,000,000    
Revenue   86,839,000  
Income from operations   5,239,000  
Amortization of intangible assets acquired 59,300    
Decrease in depreciation expense related to property and equipment acquired 14,800    
Decrease in general and administrative expense related to the direct acquisition costs 624,000    
Newborn Hearing Screening Services [Member]
     
Business Combinations (Textual) [Abstract]      
Purchase price paid in cash to acquire entity $ 3,600,000    
Tender Touch [Member]
     
Business Combinations (Textual) [Abstract]      
Acquisition date of entity Jan. 16, 2014    
Hearing Health Consultants [Member]
     
Business Combinations (Textual) [Abstract]      
Acquisition date of entity Mar. 10, 2014