Summary of Significant Accounting Policies - Fair Value of Financial Instruments Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 38,022	$ 28,338	$ 16,743
Restricted cash	304	373	984
Restricted cash for Development Projects		21,039	$ 22,414
Long-term Debt	533,682	543,697
Long-term loan, related party, net of debt issuance costs	32,969	30,954
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, at Carrying Value		28,338
Cash and Cash Equivalents, Fair Value Disclosure	38,022	28,338
Restricted cash	304	373
Restricted Cash, Current, Fair Value Disclosure	304	373
Restricted Cash Equivalents, Noncurrent	1,119	21,039
Restricted Cash Equivalents, Noncurrent, Fair Value Disclosure	1,119	21,039
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Payable, Fair Value Disclosure	32,969	30,954
Derivative Liability, Notional Amount	977	879
Long-term loan, related party, net of debt issuance costs	32,969
Notes Payable, Related Parties		30,954
Derivative Liability	977	879
Term Loan Facility, Term B Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash for Development Projects	1,100	21,000
Bangkok Bank Loan [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lines of Credit, Fair Value Disclosure	20,000	20,000
Long-term Line of Credit	20,000	20,000
Fifth Third Revolver [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lines of Credit, Fair Value Disclosure	15	15,000
Guaranty Liabilities	1,880	2,300
Long-term Line of Credit	15,000	15,000
Equipment Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	14,200	20,400
Equipment Loans [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	14,249	20,384
Lines of Credit, Fair Value Disclosure	14,249	20,384
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	143
Forward Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	477	1,865
Notes Payable to Banks [Member] | Term Loan Facility, Term B Loan [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	439,067	440,803
Notes Payable, Fair Value Disclosure	439,067	440,660
Notes Payable to Banks [Member] | Term Loan Facility, Term A Loan [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	60,363	64,750
Notes Payable, Fair Value Disclosure	60,363	64,750
Series F Preferred Stock | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Instruments, Owned, at Fair Value	$ 14,196	$ 31,122