Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies (Narrative) (Details)

v3.3.1.900
Summary Of Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Dec. 31, 2015
USD ($)
segment
$ / shares
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Dec. 31, 2012
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Number of segments | segment 3      
Cash and cash equivalents | $ $ 9,812,737 $ 13,736,857 $ 20,059,120 $ 17,869,712
Money market funds | $ $ 1,944,000      
Value of the investment in short-term money market funds sought to be preserved (in dollars per share) | $ / shares $ 1.00      
Depreciation | $ $ 3,212,000 2,375,000 2,030,000  
Product warranty period 5 years      
Research and development costs | $ $ 8,291,000 $ 7,835,000 $ 2,760,000  
Dilutive shares | shares 0 18,384 0  
Shares not included in the computation of diluted earnings per share | shares 0 243,427 0  
Employee Stock Option [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Shares not included in the computation of diluted earnings per share | shares 691,924   169,437  
Deferred Stock Awards [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Shares not included in the computation of diluted earnings per share | shares 95,668   177,886