XML 44 R12.htm IDEA: XBRL DOCUMENT v2.4.1.9
Other intangible assets with definite lives (Notes)
 3 Months Ended
Apr. 30, 2015
Other intangible assets with definite lives [Abstract]  
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]
Other intangible assets with definite lives. The Company owns several patents, including those covering features of its piping and electronic leak detection systems. Patents are capitalized and amortized on a straight-line basis over a period not to exceed the legal lives of the patents. The Company expenses costs incurred to renew or extend the term of intangible assets. Gross patents were $2.69 million and $2.68 million as of April 30, 2015 and January 31, 2015, respectively. Accumulated amortization was approximately $2.29 million and $2.28 million as of April 30, 2015 and January 31, 2015, respectively. Future amortizations over the next five years ending January 31 will be $39,400 in 2016, $49,000 in 2017, $46,000 in 2018, $37,000 in 2019, $34,000 in 2020, and $191,715 thereafter. Patents are included in other assets in the balance sheet.

 
Three Months Ended April 30,
 
2015

2014

Patent amortization expense

$13


$13