11. Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Summary of prepaid expenses and other current assets

	December 31, 2018		December 31, 2017
Value-added tax recoverable, current	$	483	$	673
Deposit and prepayment for acquisitions, net of provision of $10,840 and $10,205, respectively (a)		55		116
Other deposit and prepayment, net of provision of $452 and $306, respectively (b)		1,216		2,359
Other receivable, net of provision of $914 and $906, respectively (c)		2,628		2,835
Total prepaid expenses and other current assets	$	4,382	$	5,983