CUSTOMER CONCENTRATIONS	9 Months Ended
Oct. 31, 2018
CUSTOMER CONCENTRATIONS
CUSTOMER CONCENTRATIONS	NOTE 15 – CUSTOMER CONCENTRATIONS The majority of the Company’s consolidated revenues relate to performance by the power industry services segment which provided 76% and 91% of consolidated revenues for the three months ended October 31, 2018 and 2017, respectively, and 80% and 92% of consolidated revenues for the nine months ended October 31, 2018 and 2017, respectively. The Company’s most significant customer relationships for the three months ended October 31, 2018 included four power industry service customers which accounted for approximately 20%, 17%, 13% and 12% of consolidated revenues, respectively. The Company’s most significant customer relationships for the three months ended October 31, 2017 included three power industry service customers which accounted for approximately 36%, 24% and 13% of consolidated revenues, respectively. The Company's most significant customer relationships for the nine months ended October 31, 2018 included four power industry service customers which accounted for approximately 18%, 16%, 12% and 11% of consolidated revenues, respectively. The Company's most significant customer relationships for the nine months ended October 31, 2017 included four power industry service customers which accounted for approximately 29%, 27%, 16% and 14% of consolidated revenues, respectively. Amounts retained by three project owners were $5.4 million, $3.3 million and $0.9 million as of October 31, 2018, respectively, which in the aggregate represented 68% of the total customer retention amount of $14.2 million at that date. Amounts retained by five project owners were $19.3 million, $18.7 million, $14.1 million, $13.4 million and $3.2 million as of January 31, 2018, respectively, which in the aggregate represented 99% of the total customer retention amount of $69.7 million at that date. The accounts receivable balance from one customer represented 24% of the corresponding consolidated balance as of October 31, 2018. Accounts receivable balances from two customers each represented 18% of the corresponding consolidated balance as of January 31, 2018.

NOTE 15 – CUSTOMER CONCENTRATIONS

The majority of the Company’s consolidated revenues relate to performance by the power industry services segment which provided 76% and 91% of consolidated revenues for the three months ended October 31, 2018 and 2017, respectively, and 80% and 92% of consolidated revenues for the nine months ended October 31, 2018 and 2017, respectively.

The Company’s most significant customer relationships for the three months ended October 31, 2018 included four power industry service customers which accounted for approximately 20%, 17%, 13% and 12% of consolidated revenues, respectively. The Company’s most significant customer relationships for the three months ended October 31, 2017 included three power industry service customers which accounted for approximately 36%, 24% and 13% of consolidated revenues, respectively. The Company's most significant customer relationships for the nine months ended October 31, 2018 included four power industry service customers which accounted for approximately 18%, 16%, 12% and 11% of consolidated revenues, respectively. The Company's most significant customer relationships for the nine months ended October 31, 2017 included four power industry service customers which accounted for approximately 29%, 27%, 16% and 14% of consolidated revenues, respectively.

Amounts retained by three project owners were $5.4 million, $3.3 million and $0.9 million as of October 31, 2018, respectively, which in the aggregate represented 68% of the total customer retention amount of $14.2 million at that date. Amounts retained by five project owners were $19.3 million, $18.7 million, $14.1 million, $13.4 million and $3.2 million as of January 31, 2018, respectively, which in the aggregate represented 99% of the total customer retention amount of $69.7 million at that date. The accounts receivable balance from one customer represented 24% of the corresponding consolidated balance as of October 31, 2018. Accounts receivable balances from two customers each represented 18% of the corresponding consolidated balance as of January 31, 2018.