Annual report pursuant to Section 13 and 15(d)

Deferred Revenues and Customer Advances (Details)

v3.8.0.1
Deferred Revenues and Customer Advances (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Deferred Revenues and Customer Advances [Abstract]    
Customer advances on equipment sales $ 2,720,000 $ 2,776,000
Prepaid license fees 2,550,000 1,100,000
Total deferred revenues and customer advances $ 5,270,000 $ 3,876,000