Related Parties - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Sep. 30, 2020
SunTx Capital Partners | Affiliated Entity
Related Party Transaction [Line Items]
Payment to related party	$ 250
Consideration Note Receivable
Related Party Transaction [Line Items]
Note receivable as consideration for sale of the wholly-owned subsidiary	1,000
Accounts Payable Note Receivable
Related Party Transaction [Line Items]
Note receivable as consideration for sale of the wholly-owned subsidiary	$ 1,000
Other Current Assets | Consideration Note Receivable
Related Party Transaction [Line Items]
Note receivable as consideration for sale of the wholly-owned subsidiary		$ 100
Other Current Assets | Accounts Payable Note Receivable
Related Party Transaction [Line Items]
Note receivable as consideration for sale of the wholly-owned subsidiary		100
Other Noncurrent Assets | Consideration Note Receivable
Related Party Transaction [Line Items]
Note receivable as consideration for sale of the wholly-owned subsidiary		500
Other Noncurrent Assets | Accounts Payable Note Receivable
Related Party Transaction [Line Items]
Note receivable as consideration for sale of the wholly-owned subsidiary		$ 300