Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies (Narrative) (Details)

v3.8.0.1
Summary Of Significant Accounting Policies (Narrative) (Details)
3 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
segment
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Summary Of Significant Accounting Policies [Line Items]      
Number of segments | segment   4  
Money market funds   $ 6,193,000  
Value of the investment in short-term money market funds sought to be preserved (in dollars per share) | $ / shares   $ 1.00  
Depreciation   $ 3,156,000 $ 3,609,000
Product warranty period   5 years  
Foreign currency translation loss     4,238,497
Research and development costs   $ 3,639,000 5,366,000
Dilutive effect   0 $ 0
Impairment charge $ 1,463,000 $ 1,617,389  
Employee Stock Option [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Shares not included in the computation of diluted earnings per share | shares   1,144,159 902,930
Deferred Stock Awards [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Shares not included in the computation of diluted earnings per share | shares   181,224 133,982