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Revenue
 9 Months Ended
Jun. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The Company produces forged components for (i) turbine engines that power commercial, business and regional aircraft as well as military aircraft and other military applications; (ii) airframe applications for a variety of aircraft; (iii) industrial gas and steam turbine engines for power generation units; and (iv) other commercial applications.

The following table represents a breakout of total revenue by customer type:
Three Months Ended
June 30,		Nine Months Ended
June 30,
2021202020212020
Commercial revenue$6,453 $12,266 $26,453 $34,954 
Military revenue18,877 15,511 48,821 49,567 
Total $25,330 $27,777 $75,274 $84,521 

The following table represents revenue by the various components:
Three Months Ended
June 30,		Nine Months Ended
June 30,
Net Sales2021202020212020
Aerospace components for:
Fixed wing aircraft$8,941 $13,730 $28,907 $39,130 
Rotorcraft6,065 8,687 21,668 22,348 
Energy components for power generation units3,199 3,804 14,763 9,879 
Commercial product and other revenue7,125 1,556 9,936 13,164 
Total$25,330 $27,777 $75,274 $84,521 

The following table represents revenue by geographic region based on the Company's selling operation locations:
Three Months Ended
June 30,		Nine Months Ended
June 30,
Net Sales2021202020212020
North America$22,794 $24,261 $62,578 $75,532 
Europe2,536 3,516 12,696 8,989 
Total$25,330 $27,777 $75,274 $84,521 

In addition to the disaggregated revenue information provided above, approximately 65% and 60% of total net sales as of June 30, 2021 and 2020, respectively, was recognized on an over-time basis because of the continuous transfer of control to the customer, with the remainder recognized at a point in time. 
Contract Balances
The following table contains a roll forward of contract assets and contract liabilities for the period ended June 30, 2021:
Contract assets - Beginning balance, October 1, 2020$11,997 
Additional revenue recognized over-time49,070 
Less amounts billed to the customers(46,401)
Contract assets - Ending balance, June 30, 2021$14,666 
Contract liabilities (included within Accrued liabilities) - Beginning balance, October 1, 2020$(636)
Payments received in advance of performance obligations(628)
Performance obligations satisfied763 
Contract liabilities (included within Accrued liabilities) - Ending balance, June 30, 2021$(501)

There were no impairment losses recorded on contract assets as of June 30, 2021 and September 30, 2020.

Remaining performance obligations
As of June 30, 2021, the Company has $78,083 of remaining performance obligations, the majority of which are anticipated to be completed within the next twelve months.