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Revenue from Contracts with Customers
3 Months Ended
Apr. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue from Contracts with Customers Revenue from Contracts with Customers
The following table presents revenue from contracts with customers disaggregated by product line and timing of revenue recognition:
 Three Months Ended April 30,
20212020
Revenue recognized at a point in time:(in thousands)
Seamap$2,913 $2,014 
Klein1,150 998 
Total revenue recognized at a point in time$4,063 $3,012 
Revenue recognized over time:
Seamap$131 $175 
Total revenue recognized over time131 175 
Total revenue from contracts with customers$4,194 $3,187 

The revenue from products manufactured and sold by our Seamap and Klein businesses is generally recognized at a point in time, or when the customer takes possession of the product, based on the terms and conditions stipulated in our contracts with customers. Our Seamap business also provides Software Maintenance Agreements (“SMA”) to customers who have an active license for software embedded in Seamap products. The revenue from SMA’s is recognized over time, with the total value of the SMA amortized in equal monthly amounts over the life of the contract, which is typically twelve months.
The following table presents revenue from contracts with customers disaggregated by geography, based on shipping location of our customers:
 Three Months Ended April 30,
20212020
(in thousands)
United States$359 $1,075 
Europe, Russia & CIS2,582 1,376 
Middle East & Africa14 76 
Asia-Pacific705 302 
Canada & Latin America534 358 
Total revenue from contracts with customers$4,194 $3,187 
As of April 30, 2021, and January 31, 2020, contract assets and liabilities consisted of the following:
April 30, 2021January 31, 2021
Contract Assets:(in thousands)
Unbilled revenue - current$136 $85 
Total unbilled revenue$136 $85 
Contract Liabilities:
Deferred revenue & customer deposits - current$681 $691 
Deferred revenue & customer deposits - non-current— — 
Total deferred revenue & customer deposits$681 $691 
Considering the products manufactured and sold by our Seamap and Klein businesses and the Company’s standard contract terms and conditions, we expect our contract assets and liabilities to turn over, on average, within a period of three to nine months.
Pursuant to our accounting policies and procedures related to revenue from contracts with customers, sales and transaction-based taxes are excluded from revenue. Also, we do not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. Additionally, we expense costs incurred to obtain contracts when incurred because the amortization period would have been one year or less. These costs are recorded in selling, general and administrative expenses.