Segment Data and Foreign Operations - Revenue and Assets (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
May 31, 2020 |
May 31, 2019 |
May 31, 2020 |
May 31, 2019 |
Aug. 31, 2019 |
| Concentration risk |
|
|
|
|
|
| Revenue |
$ 64,871
|
$ 72,112
|
$ 197,255
|
$ 211,246
|
|
| Property, plant and equipment, net |
26,656
|
|
26,656
|
|
$ 29,326
|
| Goodwill and Intangible assets, less accumulated amortization |
126,047
|
|
126,047
|
|
134,690
|
| United States |
|
|
|
|
|
| Concentration risk |
|
|
|
|
|
| Revenue |
56,177
|
64,046
|
171,774
|
186,339
|
|
| Property, plant and equipment, net |
23,509
|
|
23,509
|
|
24,993
|
| Goodwill and Intangible assets, less accumulated amortization |
120,673
|
|
120,673
|
|
129,057
|
| United Kingdom |
|
|
|
|
|
| Concentration risk |
|
|
|
|
|
| Revenue |
5,070
|
4,502
|
14,489
|
12,946
|
|
| Property, plant and equipment, net |
2,246
|
|
2,246
|
|
2,493
|
| Goodwill and Intangible assets, less accumulated amortization |
4,180
|
|
4,180
|
|
4,446
|
| All other Foreign |
|
|
|
|
|
| Concentration risk |
|
|
|
|
|
| Revenue |
3,624
|
$ 3,564
|
10,992
|
$ 11,961
|
|
| Property, plant and equipment, net |
901
|
|
901
|
|
1,840
|
| Goodwill and Intangible assets, less accumulated amortization |
$ 1,194
|
|
$ 1,194
|
|
$ 1,187
|