Equity-Method Investments - Schedule of Condensed Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Company’s equity investment	$ 14,541	$ 15,942
Total
Schedule of Equity Method Investments [Line Items]
Property, plant and equipment, net	30,572	37,667
Cash and cash equivalent	9,416	8,850
Accounts receivable	7,673	8,221
Goodwill and other intangible assets	15,368	16,249
Due from related parties	19,974	20,314
Other assets	15,389	9,951
Total assets	98,392	101,252
Debt	15,739	15,961
Accounts payable	5,976	5,262
Due to related parties	0	29,208
Other liabilities	34,919	6,666
Total liabilities	56,634	57,097
Equity including non-controlling interest	41,758	44,155
Company’s equity investment before impairment		20,438
Less: Company’s impairment in equity investment		(6,496)
Company’s equity investment		13,942
CMAL
Schedule of Equity Method Investments [Line Items]
Property, plant and equipment, net	10,812	13,108
Cash and cash equivalent	9,237	7,935
Accounts receivable	5,357	6,416
Goodwill and other intangible assets	15,043	15,905
Due from related parties	0	5,900
Other assets	9,662	6,206
Total assets	50,111	55,470
Debt	6,199	9,611
Accounts payable	5,007	4,651
Due to related parties	0	17,824
Other liabilities	23,094	4,483
Total liabilities	34,300	36,569
Equity including non-controlling interest	15,811	18,901
Company’s equity investment before impairment		9,379
Less: Company’s impairment in equity investment		(4,060)
Company’s equity investment		5,319
CMAH
Schedule of Equity Method Investments [Line Items]
Property, plant and equipment, net	19,760	24,559
Cash and cash equivalent	179	915
Accounts receivable	2,316	1,805
Goodwill and other intangible assets	325	344
Due from related parties	19,974	14,414
Other assets	5,727	3,745
Total assets	48,281	45,782
Debt	9,540	6,350
Accounts payable	969	611
Due to related parties	0	11,384
Other liabilities	11,825	2,183
Total liabilities	22,334	20,528
Equity including non-controlling interest	$ 25,947	25,254
Company’s equity investment before impairment		11,059
Less: Company’s impairment in equity investment		(2,436)
Company’s equity investment		$ 8,623