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Note 3 - Accounts Receivable
 9 Months Ended
Oct. 31, 2020
Notes to Financial Statements  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Note
3
- Accounts receivable
 
The majority of the Company's accounts receivable are due from geographically dispersed contractors and manufacturing companies. Credit is extended based on an evaluation of a customer's financial condition, including the availability of credit insurance. In the U.S., collateral is
not
generally required. In the United Arab Emirates and Saudi Arabia, letters of credit are usually obtained for significant orders. Accounts receivable are due within various time periods specified in the terms applicable to the specific customer and are stated at amounts due from customers net of an allowance for claims and doubtful accounts. The allowance for doubtful accounts is based on specifically identified amounts in customers' accounts, where future collectability is deemed uncertain. Management
may
exercise its judgment in adjusting the provision as a consequence of known items, such as current economic factors and credit trends. Past due trade accounts receivable balances are written off when the Company's collection efforts have been unsuccessful in collecting the amount due and the amount is deemed uncollectible. The write-off is recorded against the allowance for doubtful accounts. 
 
One of the Company's accounts receivable in the total amount of $
3.9
million and
$4.1
million as of
October 31, 2020
and
January 31, 2020
, respectively, has been outstanding for several years. Included in this balance is a retention receivable that is payable upon the commissioning of the system in the amount of $
3.4
million, of which, due to the long-term nature of the receivable,
$1.6
million and $
2.1
 million were included in the balance of other long-term assets
as of
October 31, 2020
and
January 31, 2020
, respectively. The Company completed all of its deliverables in
2015
under the related contract, but the system has
not
yet been commissioned by the customer. Nevertheless, the Company has been engaged in ongoing active efforts to collect this outstanding amount. During the
first
quarter of
2020,
the Company certified invoices of
$0.5
million in the process of collection. During the
third
quarter of
2020,
the Company received approximately
$0.2
million from the customer and additional receipts are expected in the
fourth
quarter of
2020
and in
2021.
The Company continues to engage with the customer to ensure full payment of open balances, and during fiscal
2019
received an updated acknowledgment of the outstanding balances and assurances of payment from the customer. As a result, the Company did
not
reserve any allowance against this receivable as of
October 31, 2020
. However, if the Company's efforts to collect on this account are
not
successful, the Company
may
recognize an allowance for all, or substantially all, of any such then uncollected amounts. 
 
For the
three
months ended 
October 31, 2020
, 
no
individual customer accounted for 
10%
of the Company's consolidated net sales, and during the same period in 
2019,
one
individual customer accounted for
16%
of the Company's consolidated net sales. For the
nine
 months ended
October 31, 2020
,
no
individual customer accounted for more than
10%
of the Company's consolidated net sales, and during the same period in
2019,
one
individual customer accounted for
11%
of the Company's consolidated net sales.
 
At 
October 31, 2020
and
January 31, 2020
, 
one
customer accounted for
10.1%
 and 
13.3%
of the Company's accounts receivable, respectively.