Fair Value Measurements - Additional Information (Detail) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	$ 48,294,000	$ 192,434,000
DEG Vietnam Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	5,000,000	6,250,000
Fair value	5,062,000	6,360,000
Fair Value, Recurring Basis
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	0	0
Financial liabilities, fair value	0	0
Fair Value, Nonrecurring Basis
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	0	0
Financial liabilities, fair value	$ 0	$ 0