Quarterly report pursuant to Section 13 or 15(d)

Deferred Revenues and Customer Advances (Details)

v3.10.0.1
Deferred Revenues and Customer Advances (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Deferred Revenues and Customer Advances [Abstract]    
Customer advances on equipment sales $ 3,123,000 $ 2,720,000
Prepaid license fees 1,450,000 2,550,000
Total deferred revenues and customer advances $ 4,573,000 $ 5,270,000