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Sales
 6 Months Ended
Aug. 31, 2020
Revenues [Abstract]  
Sales Sales
Disaggregated Sales
The following table presents disaggregated sales by customer industry (in thousands):
 Three Months Ended August 31,Six Months Ended August 31,
 2020201920202019
Sales:
Industrial$67,112 $139,352 $197,220 $304,152 
Transmission and distribution97,619 56,686 146,676 128,967 
Power generation38,641 40,152 72,768 92,194 
Total sales$203,372 $236,190 $416,664 $525,313 
See Note 4 for sales information by segment.
Contract Liabilities
The following table shows the changes in contract liabilities for the six months ended August 31, 2020 and 2019, respectively (in thousands):
August 31, 2020August 31, 2019
Balance at beginning of period$18,418 $56,928 
Contract liabilities added during the period2,738 18,234 
Sales recognized during the period(7,400)(51,504)
Balance at end of period$13,756 $23,658 
The Company did not record any sales for the six months ended August 31, 2020 or 2019 related to performance obligations satisfied in prior periods. The increases or decreases in accounts receivable, contract assets, and contract liabilities during the six months ended August 31, 2020 and 2019 were due primarily to normal timing differences between the Company’s performance and customer payments, somewhat impacted by customer inspection delays and effects of COVID-19 on our customers.
The Company expects to recognize sales, related to the $13.8 million balance of contract liabilities as of August 31, 2020 of approximately $5.9 million, $5.5 million, $2.2 million and $0.2 million in fiscal 2021, 2022, 2023 and 2024, respectively.