Stockholders' equity

9 Months Ended

Sep. 30, 2017

Stockholders' Equity Note [Abstract]

Stockholders’ equity

Stockholders’ equity

Common Stock

As of September 30, 2017, the Company had reserved 7,464,041 common stock for issuance under its equity incentive plans and 426,840 common stock shares for issuance under its employee stock purchase plan.

Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss, net of related taxes, were as follows (in thousands):

	Foreign Currency Translation Adjustments			Unrealized Gain (Loss) on Available-For-Sale Securities			Defined Benefit Pension Plan Adjustment			Total Accumulated Other Comprehensive Loss
Balance as of December 31, 2016	$	(8,235	)	$	(19	)	$	(147	)	$	(8,401	)
Other comprehensive income, net of taxes of zero and reclassifications	6,090			17			—			6,107
Balance as of September 30, 2017	$	(2,145	)	$	(2	)	$	(147	)	$	(2,294	)

No material amounts were reclassified out of accumulated other comprehensive income during the three and nine months ended September 30, 2017 and 2016 for realized gains or losses on available-for-sale securities.

Accumulated Deficit

Approximately $8.7 million of the Company’s retained earnings within its total accumulated deficit as of December 31, 2016 was subject to restriction due to the fact that the Company’s subsidiaries in China are required to set aside at least 10% of their respective accumulated profits each year end to fund statutory common reserves as well as allocate a discretional portion of their after-tax profits to their staff welfare and bonus fund.