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Patents
3 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents
3. Patents
 
Patent intangible assets consisted of the following at March 31, 2017:
 
 
 
Weighted
 
 
 
 
 
 
 
 
 
Average
 
Gross Carrying
 
Accumulated
 
Net Carrying
 
 
 
Useful Life
 
Amount
 
Amortization
 
Amount
 
Amortizable intangible assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Patents
 
 
 
5.65
 
$
11,893,745
 
$
(5,112,549)
 
$
6,781,196
 
Total patent intangible assets
 
 
 
 
 
$
11,893,745
 
$
(5.112.549)
 
$
6,781,196
 
 
Patent intangible assets consisted of the following at December 31, 2016:
 
 
 
Weighted
 
 
 
 
 
 
 
 
 
Average
 
Gross Carrying
 
Accumulated
 
Net Carrying
 
 
 
Useful Life
 
Amount
 
Amortization
 
Amount
 
Amortizable intangible assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Patents
 
 
 
5.9
 
$
11,893,745
 
$
(4,734,804)
 
$
7,158,941
 
Total patent intangible assets
 
 
 
 
 
$
11,893,745
 
$
(4,734,804)
 
$
7,158,941
 
 
Following the establishment of INVT SPE for the PRIP and the related assignment of the Patents to INVT SPE which occurred in April 2017 (see Note 5), minimal patent amortization expenses are expected in future periods.