Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Components of Debt, Obligations, Weighted Average Interest Rate and Additional Fair Value Information Relating to Outstanding Debt Instruments

The table below summarizes the carrying amount and weighted average interest rate of the Company’s debt (in thousands, except percentages): 

	December 31, 2018					December 31, 2017
	Carrying Amount			Interest Rate		Carrying Amount			Interest Rate
Note payable to Shanghai Pudong Development Bank	$	—		—	%	$	17,000		4.10	%
Note payable to China CITIC Bank	—			—	%	17,000			4.00	%
Notes payable to suppliers	4,795					1,607
Total notes payable and short-term borrowing	$	4,795				$	35,607
Long-term debt, current and non-current:
Borrowing under Wells Fargo Credit Facility	$	35,961		4.41	%	$	30,018		3.29	%
Mitsubishi Bank loans	11,094			1.05%-1.45%		16,924			1.05% -1.45%
Mitsubishi Bank and Yamanashi Chou Bank loan	6,898			1.10	%	—
Unaccreted discount and issuance costs within current portion of long-term debt	(161		)			(86		)
Unaccreted discount and issuance costs within long-term debt, net of current portion	(441		)			(295		)
Total long-term debt, net of unaccreted discount and issuance costs	$	53,351				$	46,561
Reported as:
Current portion of long-term debt	$	2,897				$	6,005
Long-term debt, net of current portion	50,454					40,556
Total long-term debt, net of unaccreted discount and issuance costs	$	53,351				$	46,561

Maturities of Long-term Debt

At December 31, 2018, maturities of long-term debt were as follows (in thousands): 

2019	$	3,058
2020	3,058
2021	3,058
2022	39,019
2023	3,058
Thereafter	2,702
	$	53,953