Annual report pursuant to Section 13 and 15(d)

REVENUE - Revenue Disaggregated by Market (Details)

v3.22.0.1
REVENUE - Revenue Disaggregated by Market (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]          
Sales $ 116,052 $ 114,803 $ 444,908 $ 502,587 $ 772,702
Commercial Transport          
Disaggregation of Revenue [Line Items]          
Sales     201,990 262,636 523,921
Military          
Disaggregation of Revenue [Line Items]          
Sales     70,312 67,944 76,542
Business Jet          
Disaggregation of Revenue [Line Items]          
Sales     56,673 60,437 67,541
Other          
Disaggregation of Revenue [Line Items]          
Sales     36,263 26,971 24,605
Aerospace          
Disaggregation of Revenue [Line Items]          
Sales     365,238 417,988 692,609
Semiconductor          
Disaggregation of Revenue [Line Items]          
Sales     0 3,483 9,692
Aerospace & Defense          
Disaggregation of Revenue [Line Items]          
Sales     79,670 81,116 70,401
Test Systems          
Disaggregation of Revenue [Line Items]          
Sales     $ 79,670 $ 84,599 $ 80,093