Quarterly report pursuant to Section 13 or 15(d)

Amortizable intangible assets (Notes)

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Amortizable intangible assets (Notes)
 6 Months Ended
Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Disclosure [Text Block]
Intangible assets other than goodwill
As of December 31, 2014 and June 30, 2015 the Company has the following amounts related to intangible assets:
 
Product
Certifications
 
Patents
 
Developed Technology
 
Total
Balance at December 31, 2014
 

 
 

 
 
 
 

Intangible assets
$
475,344

 
$
514,930

 
$
240,000

 
$
1,230,274

Less - accumulated amortization
(128,732
)
 
(62,242
)
 
(28,000
)
 
(218,974
)
 
$
346,612

 
$
452,688

 
$
212,000

 
$
1,011,300

 
 
 
 
 
 
 
 
Balance at June 30, 2015
 

 
 

 
 
 
 

Intangible assets
$
508,127

 
$
577,232

 
240,000

 
$
1,325,359

Less - accumulated amortization
(157,618
)
 
(76,775
)
 
(36,000
)
 
(270,393
)
 
$
350,509

 
$
500,457

 
$
204,000

 
$
1,054,966


The aggregate amortization expense of the Company's intangible assets for the three and six months ended June 30, 2015 and 2014 was $28,136 and $20,853, and $51,419 and $40,825, respectively.